2021年10月31日 · 内容提示： This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on …

2024年8月6日 · This specification covers the materials and the test methods for use in chemical admixtures to be added to hydraulic-cement concrete mixtures in the field.

ASTM C494 outlines the requirements and test methods for chemical admixtures used in hydraulic-cement concrete mixtures. It classifies admixtures into eight types based on their …

This standard is issued under the fixed designation C494/C494M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the …

2025年3月13日 · astm c494/c494m-17的标准全文信息,1.1 本规范涵盖了用作化学外加剂的材料，在现场添加到水硬性水泥混凝土混合物中，用于以下八种类型所示的目的： 1.1.1“a 型”；减 …

Replacement remote control for Yamaha RAV494 RAV498 RX-V575 RX-V475 HTR-4066 with all functions of original one. It replace each button of original remote control. You will receive it …

2019年12月15日 · This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures for the purpose or purposes indicated for the eight …