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油井水泥外加剂 减阻剂检测

发布日期: 2024-06-21 17:34:53 - 更新时间:2024年06月29日 15:22

油井水泥外加剂 减阻剂检测项目报价?  解决方案?  检测周期?  样品要求?

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GB/T 19139-2012油井水泥试验方法

本标准规定了油井水泥应用性能的试验方法和有关参数的计算,对于水泥石抗压强度试验和水泥浆稠化时间试验,还给出了具有代表性的试验方案。本标准适用于油、气井注水泥作业用油井水泥浆的设计和性能评价,油井水泥浆可基于(但不限于)GB 10238规定的油井水泥级别和类型。

GB/T 28911-2012石油天然气钻井工程术语

本标准规定了石油天然气钻井工程专用的术语。本标准适用于石油天然气钻井工程领域,也适用于石油天然气工业的其他领域。

CECS 246-2008给水排水工程顶管技术规程

本规程主要适用于DN800以上使用顶管机顶进的给水排水工程顶管工程的设计、施工和验收,小直径顶管工程和非给水排水工程的顶管工程也可参照使用。

SY/T 5504.1-2013油井水泥外加剂评价方法第1部分:缓凝剂

SY/T 5504的本部分规定了油气井注水泥作业用油井水泥缓凝剂的性能要求、评价方法及评价报告。本部分适用于油气井注水泥作业用油井水泥缓凝剂的评价。

SY/T 5504.2-2013油井水泥外加剂评价方法第2部分:降 失水剂

SY/T 5504的本部分规定了油气井注水泥作业用油井水泥降失水剂的性能要求、评价方法及评价报告。本部分适用于油气井注水泥作业用油井水泥降失水剂的评价。

SY/T 5504.3-2018油井水泥外加剂评价方法 第3部分:减阻剂

SY/T 5504的本部分规定了油气井注水泥作业用油井水泥减阻剂的性能要求、试验方法以及评价报告。本部分适用于油气井注水泥作业用油井水泥减阻剂的评价。

SY/T 5504.7-2010油井水泥外加剂评价方法 第7部分:加重剂

SY/T 5504的本部分规定了油井水泥加重剂的性能要求、试验方法以及评价报告。本部分适用于油井水泥加重剂的评价。

SY/T 5504.8-2013油井水泥外加剂评价方法第8部分:膨胀剂

SY/T 5504的本部分规定了油、气井注水泥作业用油井水泥膨胀剂的性能要求、评价方法及评价报告。本部分适用于油、气井注水泥作业用油井水泥膨胀剂的评价。

DZ/T 0260-2014地热钻探技术规程

本标准规定了地热钻探设备选择、钻探工艺、成井工艺、工程质量、安全施工、职业健康及环境保护等技术工作要求,可作为地热钻探设计、施工、管理等各项工作的依据。本标准适用于勘探或开发地热蒸汽和地热水的钻探工作。

TB 10014-2012铁路工程地质钻探规程

本规程适用于铁路工程地质、水文地质钻探及物探测井、孔内测试钻孔的钻探工作。

ASTM C494/C494M-2005a混凝土用化学外加剂标准规范

1.1 This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures in the field for the purpose or purposes indicated for the seven types as follows:1.1.1 Type A8212;Water-reducing admixtures,1.1.2 Type B8212;Retarding admixtures,1.1.3 Type C8212;Accelerating admixtures,1.1.4 Type D8212;Water-reducing and retarding admixtures,1.1.5 Type E8212;Water-reducing and accelerating admixtures,1.1.6 Type F8212;Water-reducing, high range admixtures, and1.1.7 Type G8212;Water-reducing, high range, and retarding admixtures.1.2 This specification stipulates tests of an admixture with suitable concreting materials as described in 11.1-11.3 or with cement, pozzolan, aggregates, and an air-entraining admixture proposed for specific work (11.4). Unless specified otherwise by the purchaser, the tests shall be made using concreting materials as described in 11.1-11.3. Note 18212;It is recommended that, whenever practicable, tests be made using the cement, pozzolan, aggregates, air-entraining admixture, and the mixture proportions, batching sequence, and other physical conditions proposed for the specific work (11.4) because the specific effects produced by chemical admixtures may vary with the properties and proportions of the other ingredients of the concrete. For instance, Types F and G admixtures may exhibit much higher water reduction in concrete mixtures having higher cement factors than that listed in 12.1.1.Mixtures having a high range water reduction generally display a higher rate of slump loss. When high-range admixtures are used to impart increased workability (6 to 8-in. slump [150 to 200-mm]), the effect may be of limited duration, reverting to the original slump in 30 to 60 min depending on factors normally affecting rate of slump loss. The use of chemical admixtures to produce high-slump (flowing) concrete is covered by Specification C 1017.Note 28212;The purchaser should ensure that the admixture supplied for use in the work is equivalent in composition to the admixture subjected to test under this specification (see Section 6, Uniformity and Equivalence).Note 38212;Admixtures that contain relatively large amounts of chloride may accelerate corrosion of prestressing steel. Compliance with the requirements of this specification does not constitute assurance of acceptability of the admixture for use in prestressed concrete.1.3 This specification provides for three levels of testing.1.3.1 Level 18212;During the initial approval stage, proof of compliance with the performance requirements defined in Table 1 demonstrates that the admixture meets the requirements of this specification. Admixtures (except for Types B, C, and E) shall qualify for provisional compliance when the alternative compressive strength requirements in Table 1 are met. If subsequent test results at 6 months or one year fail to meet the standard requirement of 100 % of reference strength, the compliance of the admixture to this standard is withdrawn and all users of the admixture shall be notified immediately. Uniformity and equivalence tests of Section 6 shall be carried out to provide results against which later comparisons can be made (See Note 4).Note 0&38212;Allowing for provisional compliance while retaining longer term compressive strength requirements promotes more rapid qualification of new materials, but also provides assurance that new admixture technologies will not exhibit unexpected longer term performance. The alternative compressive strength requirements in are based on statistical analysis of 103 Specification C 494/C 494M evaluation tests. The alternative requirements correspond to a 99 % probability of passing subsequent test age requirements.1.3.2 Level 28212;Limited retesting is descr

ASTM C494/C494M-2008混凝土化学外加剂标准规范

1.1 This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures in the field for the purpose or purposes indicated for the seven types as follows: 1.1.1 Type A8212;Water-reducing admixtures, 1.1.2 Type B8212;Retarding admixtures, 1.1.3 Type C8212;Accelerating admixtures, 1.1.4 Type D8212;Water-reducing and retarding admixtures, 1.1.5 Type E8212;Water-reducing and accelerating admixtures, 1.1.6 Type F8212;Water-reducing, high range admixtures, and 1.1.7 Type G8212;Water-reducing, high range, and retarding admixtures. 1.2 This specification stipulates tests of an admixture with suitable concreting materials as described in 11.1-11.3 or with cement, pozzolan, aggregates, and an air-entraining admixture proposed for specific work (11.4). Unless specified otherwise by the purchaser, the tests shall be made using concreting materials as described in 11.1-11.3. Note 18212;It is recommended that, whenever practicable, tests be made using the cement, pozzolan, aggregates, air-entraining admixture, and the mixture proportions, batching sequence, and other physical conditions proposed for the specific work (11.4) because the specific effects produced by chemical admixtures may vary with the properties and proportions of the other ingredients of the concrete. For instance, Types F and G admixtures may exhibit much higher water reduction in concrete mixtures having higher cement factors than that listed in 12.1.1. Mixtures having a high range water reduction generally display a higher rate of slump loss. When high-range admixtures are used to impart increased workability (6 to 8-in. slump [150 to 200x2013;mm]), the effect may be of limited duration, reverting to the original slump in 30 to 60 min depending on factors normally affecting rate of slump loss. The use of chemical admixtures to produce high-slump (flowing) concrete is covered by Specification C 1017. Note 28212;The purchaser should ensure that the admixture supplied for use in the work is equivalent in composition to the admixture subjected to test under this specification (see Section 6, Uniformity and Equivalence). Note 38212;Admixtures that contain relatively large amounts of chloride may accelerate corrosion of prestressing steel. Compliance with the requirements of this specification does not constitute assurance of acceptability of the admixture for use in prestressed concrete. 1.3 This specification provides for three levels of testing. 1.3.1 Level 18212;During the initial approval stage, proof of compliance with the performance requirements defined in Table 1 demonstrates that the admixture meets the requirements of this specification. Admixtures (except for Types B, C, and E) shall qualify for provisional compliance when the physical requirements and any of the alternative compressive strength requirements in Table 1 are met. If subsequent test results at 6 months or one year fail to meet the standard requirement of 100 % of reference strength, the compliance of the admixture to this standard is withdrawn and all users

ASTM C494/C494M-2008a混凝土化学外加剂标准规范

1.1 This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures in the field for the purpose or purposes indicated for the eight types as follows: 1.1.1 Type A8212;Water-reducing admixtures, 1.1.2 Type B8212;Retarding admixtures, 1.1.3 Type C8212;Accelerating admixtures, 1.1.4 Type D8212;Water-reducing and retarding admixtures, 1.1.5 Type E8212;Water-reducing and accelerating admixtures, 1.1.6 Type F8212;Water-reducing, high range admixtures, 1.1.7 Type G8212;Water-reducing, high range, and retarding admixtures, and 1.1.8 Type S8212;Specific performance admixtures. 1.2 This specification stipulates tests of an admixture with suitable concreting materials as described in 11.1-11.3 or with cement, pozzolan, aggregates, and an air-entraining admixture proposed for specific work (11.4). Unless specified otherwise by the purchaser, the tests shall be made using concreting materials as described in 11.1-11.3. Note 18212;It is recommended that, whenever practicable, tests be made using the cement, pozzolan, aggregates, air-entraining admixture, and the mixture proportions, batching sequence, and other physical conditions proposed for the specific work (11.4) because the specific effects produced by chemical admixtures may vary with the properties and proportions of the other ingredients of the concrete. For instance, Types F and G admixtures may exhibit much higher water reduction in concrete mixtures having higher cement factors than that listed in 12.1.1. Mixtures having a high range water reduction generally display a higher rate of slump loss. When high-range admixtures are used to impart increased workability (6 to 8-in. slump [150 to 200x2013;mm]), the effect may be of limited duration, reverting to the original slump in 30 to 60 min depending on factors normally affecting rate of slump loss. The use of chemical admixtures to produce high-slump (flowing) concrete is covered by Specification C 1017. Note 28212;The purchaser should ensure that the admixture supplied for use in the work is equivalent in composition to the admixture subjected to test under this specification (see Section 6, Uniformity and Equivalence). Note 38212;Admixtures that contain relatively large amounts of chloride may accelerate corrosion of prestressing steel. Compliance with the requirements of this specification does not constitute assurance of acceptability of the admixture for use in prestressed concrete. 1.3 This specification provides for three levels of testing. 1.3.1 Level 18212;During the initial approval stage, proof of compliance with the performance requirements defined in Table 1 demonstrates that the admixture meets the requirements of this specification. Admixtures (except for Types B, C, E, and S) shall qualify for provisional compliance when the physical requirements and any of the alternative compressive strength requirements in Table 1 are met. If subsequent test results at 6 months or one year fail to meet the st

ASTM C494/C494M-2010混凝土用化学添加剂的标准规范

1.1 This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures in the field for the purpose or purposes indicated for the eight types as follows: 1.1.1 Type A8212;Water-reducing admixtures, 1.1.2 Type B8212;Retarding admixtures, 1.1.3 Type C8212;Accelerating admixtures, 1.1.4 Type D8212;Water-reducing and retarding admixtures, 1.1.5 Type E8212;Water-reducing and accelerating admixtures, 1.1.6 Type F8212;Water-reducing, high range admixtures, 1.1.7 Type G8212;Water-reducing, high range, and retarding admixtures, and 1.1.8 Type S8212;Specific performance admixtures. 1.2 This specification stipulates tests of an admixture with suitable concreting materials as described in 11.1-11.3 or with cement, pozzolan, aggregates, and an air-entraining admixture proposed for specific work (11.4). Unless specified otherwise by the purchaser, the tests shall be made using concreting materials as described in 11.1-11.3. Note 18212;It is recommended that, whenever practicable, tests be made using the cement, pozzolan, aggregates, air-entraining admixture, and the mixture proportions, batching sequence, and other physical conditions proposed for the specific work (11.4) because the specific effects produced by chemical admixtures may vary with the properties and proportions of the other ingredients of the concrete. For instance, Types F and G admixtures may exhibit much higher water reduction in concrete mixtures having higher cement factors than that listed in 12.1.1. Mixtures having a high range water reduction generally display a higher rate of slump loss. When high-range admixtures are used to impart increased workability (6 to 8-in. slump [150 to 200x2013;mm]), the effect may be of limited duration, reverting to the original slump in 30 to 60 min depending on factors normally affecting rate of slump loss. The use of chemical admixtures to produce high-slump (flowing) concrete is covered by Specification C1017/C1017M. Note 28212;The purchaser should ensure that the admixture supplied for use in the work is equivalent in composition to the admixture subjected to test under this specification (see Section 6, Uniformity and Equivalence). Note 38212;Admixtures that contain relatively large amounts of chloride may accelerate corrosion of prestressing steel. Compliance with the requirements of this specification does not constitute assurance of acceptability of the admixture for use in prestressed concrete. 1.3 This specification provides for three levels of testing. 1.3.1 Level 18212;During the initial approval stage, proof of compliance with the performance requirements defined in Table 1 demonstrates that the admixture meets the requirements of this specification. Admixtures (except for Types B, C, E, and S) shall qualify for provisional compliance when the physical requirements and any of the alternative compressi

ASTM C494/C494M-2010a混凝土用化学添加剂的标准规格

1.1 This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures in the field for the purpose or purposes indicated for the eight types as follows: 1.1.1 Type A8212;Water-reducing admixtures, 1.1.2 Type B8212;Retarding admixtures, 1.1.3 Type C8212;Accelerating admixtures, 1.1.4 Type D8212;Water-reducing and retarding admixtures, 1.1.5 Type E8212;Water-reducing and accelerating admixtures, 1.1.6 Type F8212;Water-reducing, high range admixtures, 1.1.7 Type G8212;Water-reducing, high range, and retarding admixtures, and 1.1.8 Type S8212;Specific performance admixtures. 1.2 This specification stipulates tests of an admixture with suitable concreting materials as described in 11.1-11.3 or with cement, pozzolan, aggregates, and an air-entraining admixture proposed for specific work (11.4). Unless specified otherwise by the purchaser, the tests shall be made using concreting materials as described in 11.1-11.3. Note 18212;It is recommended that, whenever practicable, tests be made using the cement, pozzolan, aggregates, air-entraining admixture, and the mixture proportions, batching sequence, and other physical conditions proposed for the specific work (11.4) because the specific effects produced by chemical admixtures may vary with the properties and proportions of the other ingredients of the concrete. For instance, Types F and G admixtures may exhibit much higher water reduction in concrete mixtures having higher cement factors than that listed in 12.1.1.

ASTM C494/C494M-2011混凝土用化学添加剂的标准规范

1.1 This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures in the field for the purpose or purposes indicated for the eight types as follows: 1.1.1 Type A8212;Water-reducing admixtures, 1.1.2 Type B8212;Retarding admixtures, 1.1.3 Type C8212;Accelerating admixtures, 1.1.4 Type D8212;Water-reducing and retarding admixtures, 1.1.5 Type E8212;Water-reducing and accelerating admixtures, 1.1.6 Type F8212;Water-reducing, high range admixtures, 1.1.7 Type G8212;Water-reducing, high range, and retarding admixtures, and 1.1.8 Type S8212;Specific performance admixtures. 1.2 This specification stipulates tests of an admixture with suitable concreting materials as described in 11.1-11.3 or with cement, pozzolan, aggregates, and an air-entraining admixture proposed for specific work (11.4). Unless specified otherwise by the purchaser, the tests shall be made using concreting materials as described in 11.1-11.3. Note 18212;It is recommended that, whenever practicable, tests be made using the cement, pozzolan, aggregates, air-entraining admixture, and the mixture proportions, batching sequence, and other physical conditions proposed for the specific work (11.4) because the specific effects produced by chemical admixtures may vary with the properties and proportions of the other ingredients of the concrete. For instance, Types F and G admixtures may exhibit much higher water reduction in concrete mixtures having higher cement factors than that listed in 12.1.1. Mixtures having a high range water reduction generally display a higher rate of slump loss. When high-range admixtures are used to impart increased workability (6 to 8-in. slump [150 to 200x2013;mm]), the effect may be of limited duration, reverting to the original slump in 30 to 60 min depending on factors normally affecting rate of slump loss. The use of chemical admixtures to produce high-slump (flowing) concrete is covered by Specification C1017/C1017M. Note 28212;The purchaser should ensure that the admixture supplied for use in the work is equivalent in composition to the admixture subjected to test under this specification (see Section 6, Uniformity and Equivalence). Note 38212;Admixtures that contain relatively large amounts of chloride may accelerate corrosion of prestressing steel. Compliance with the requirements of this specification does not constitute assurance of acceptability of the admixture for use in prestressed concrete. 1.3 This specification provides for three levels of testing. 1.3.1 Level 18212;During the initial approval stage, proof of compliance with the performance requirements defined in Table 1 demonstrates that the admixture meets the requirements of this specification. Admixtures (except for Types B, C, E, and S) shall qualify for provisional compliance when the physical requirements and any of the alternative compressi

ASTM C494/C494M-2012混凝土用化学添加剂的标准规范

1.1 This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures in the field for the purpose or purposes indicated for the eight types as follows: 1.1.1 Type A8212;Water-reducing admixtures, 1.1.2 Type B8212;Retarding admixtures, 1.1.3 Type C8212;Accelerating admixtures, 1.1.4 Type D8212;Water-reducing and retarding admixtures, 1.1.5 Type E8212;Water-reducing and accelerating admixtures, 1.1.6 Type F8212;Water-reducing, high range admixtures, 1.1.7 Type G8212;Water-reducing, high range, and retarding admixtures, and 1.1.8 Type S8212;Specific performance admixtures. 1.2 This specification stipulates tests of an admixture with suitable concreting materials as described in 11.1-11.3 or with cement, pozzolan, aggregates, and an air-entraining admixture proposed for specific work (11.4). Unless specified otherwise by the purchaser, the tests shall be made using concreting materials as described in 11.1-11.3. Note 18212;It is recommended that, whenever practicable, tests be made using the cement, pozzolan, aggregates, air-entraining admixture, and the mixture proportions, batching sequence, and other physical conditions proposed for the specific work (11.4) because the specific effects produced by chemical admixtures may vary with the properties and proportions of the other ingredients of the concrete. For instance, Types F and G admixtures may exhibit much higher water reduction in concrete mixtures having higher cement factors than that listed in 12.1.1. Mixtures having a high range water reduction generally display a higher rate of slump loss. When high-range admixtures are used to impart increased workability (6 to 8-in. slump [150 to 200x2013;mm]), the effect may be of limited duration, reverting to the original slump in 30 to 60 min depending on factors normally affecting rate of slump loss. The use of chemical admixtures to produce high-slump (flowing) concrete is covered by Specification C1017/C1017M. Note 28212;The purchaser should ensure that the admixture supplied for use in the work is equivalent in composition to the admixture subjected to test under this specification (see Section 6, Uniformity and Equivalence). Note 38212;Admixtures that contain relatively large amounts of chloride may accelerate corrosion of prestressing steel. Compliance with the requirements of this specification does not constitute assurance of acceptability of the admixture for use in prestressed concrete. 1.3 This specification provides for three levels of testing. 1.3.1 Level 18212;During the initial approval stage, proof of compliance with the performance requirements defined in Table 1 demonstrates that the admixture meets the requirements of this specification. Admixtures (except for Types B, C, E, and S) shall qualify for provisional compliance when the physical requirements and any of the alternative compressive strength require

ASTM C494/C494M-2013混凝土用化学添加剂标准规格

1.1x00a0;This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures in the field for the purpose or purposes indicated for the eight types as follows: 1.1.1x00a0;Type Ax2014;Water-reducing admixtures, 1.1.2x00a0;Type Bx2014;Retarding admixtures, 1.1.3x00a0;Type Cx2014;Accelerating admixtures, 1.1.4x00a0;Type Dx2014;Water-reducing and retarding admixtures, 1.1.5x00a0;Type Ex2014;Water-reducing and accelerating admixtures, 1.1.6x00a0;Type Fx2014;Water-reducing, high range admixtures, 1.1.7x00a0;Type Gx2014;Water-reducing, high range, and retarding admixtures, and 1.1.8x00a0;Type Sx2014;Specific performance admixtures. 1.2x00a0;This specification stipulates tests of an admixture with suitable concreting materials as described in 11.1-11.3 or with cement, pozzolan, aggregates, and an air-entraining admixture proposed for specific work (11.4). Unless specified otherwise by the purchaser, the tests shall be made using concreting materials as described in 11.1-11.3. Note 1x2014;It is recommended that, whenever practicable, tests be made using the cement, pozzolan, aggregates, air-entraining admixture, and the mixture proportions, batching sequence, and other physical conditions proposed for the specific work (11.4) because the specific effects produced by chemical admixtures may vary with the properties and proportions of the other ingredients of the concrete. For instance, Types F and G admixtures may exhibit much higher water reduction in concrete mixtures having higher cement factors than that listed in 12.1.1. Mixtures having a high range water reduction generally display a higher rate of slump loss. When high-range admixtures are used to impart increased workability (6 to 8-in. slump [150 to 200x2013;mm]), the effect may be of limited duration, reverting to the original slump in 30 to 60 min depending on factors normally affecting rate of slump loss. The use of chemical admixtures to produce high-slump (flowing) concrete is covered by Specification C1017/C1017M.

ASTM C494/C494M-2015混凝土用化学外加剂的标准规格

1.1x00a0;This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures in the field for the purpose or purposes indicated for the eight types as follows: 1.1.1x00a0;Type Ax2014;Water-reducing admixtures, 1.1.2x00a0;Type Bx2014;Retarding admixtures, 1.1.3x00a0;Type Cx2014;Accelerating admixtures, 1.1.4x00a0;Type Dx2014;Water-reducing and retarding admixtures, 1.1.5x00a0;Type Ex2014;Water-reducing and accelerating admixtures, 1.1.6x00a0;Type Fx2014;Water-reducing, high range admixtures, 1.1.7x00a0;Type Gx2014;Water-reducing, high range, and retarding admixtures, and 1.1.8x00a0;Type Sx2014;Specific performance admixtures. 1.2x00a0;This specification stipulates tests of an admixture with suitable concreting materials as described in 11.1 x2013; 11.3 or with cement, pozzolan, aggregates, and an air-entraining admixture proposed for specific work (11.4). Unless specified otherwise by the purchaser, the tests shall be made using concreting materials as described in 11.1 x2013; 11.3. Note 1:x00a0;It is recommended that, whenever practicable, tests be made using the cement, pozzolan, aggregates, air-entraining admixture, and the mixture proportions, batching sequence, and other physical conditions proposed for the specific work (11.4) because the specific effects produced by chemical admixtures may vary with the properties and proportions of the other ingredients of the concrete. For instance, Types F and G admixtures may exhibit much higher water reduction in concrete mixtures having higher cement factors than that listed in 12.1.1. Mixtures having a high range water reduction generally display a higher rate of slump loss. When high-range admixtures are used to impart increased workability (6 to 8-in. slump [150 to 200x2013;mm]), the effect may be of limited duration, reverting to the original slump in 30 to 60 min depending on factors normally affecting rate of slump loss. The use of chemical admixtures to produce high-slump (flowing) concrete is covered by Specification C1017/C1017M.

ASTM C494/C494M-2015a混凝土用化学外加剂的标准规格

1.1x00a0;This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures in the field for the purpose or purposes indicated for the eight types as follows: 1.1.1x00a0;Type Ax2014;Water-reducing admixtures, 1.1.2x00a0;Type Bx2014;Retarding admixtures, 1.1.3x00a0;Type Cx2014;Accelerating admixtures, 1.1.4x00a0;Type Dx2014;Water-reducing and retarding admixtures, 1.1.5x00a0;Type Ex2014;Water-reducing and accelerating admixtures, 1.1.6x00a0;Type Fx2014;Water-reducing, high range admixtures, 1.1.7x00a0;Type Gx2014;Water-reducing, high range, and retarding admixtures, and 1.1.8x00a0;Type Sx2014;Specific performance admixtures. 1.2x00a0;This specification stipulates tests of an admixture with suitable concreting materials as described in 11.1 x2013; 11.3 or with cement, pozzolan, aggregates, and an air-entraining admixture proposed for specific work (11.4). Unless specified otherwise by the purchaser, the tests shall be made using concreting materials as described in 11.1 x2013; 11.3. Note 1:x00a0;It is recommended that, whenever practicable, tests be made using the cement, pozzolan, aggregates, air-entraining admixture, and the mixture proportions, batching sequence, and other physical conditions proposed for the specific work (11.4) because the specific effects produced by chemical admixtures may vary with the properties and proportions of the other ingredients of the concrete. For instance, Types F and G admixtures may exhibit much higher water reduction in concrete mixtures having higher cement factors than that listed in 12.1.1. Mixtures having a high range water reduction generally display a higher rate of slump loss. When high-range admixtures are used to impart increased workability (6 to 8-in. slump [150 to 200x2013;mm]), the effect may be of limited duration, reverting to the original slump in 30 to 60 min depending on factors normally affecting rate of slump loss. The use of chemical admixtures to produce high-slump (flowing) concrete is covered by Specification C1017/C1017M.

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