T/WHWX 003-2019 Active Group standards

T/WHWX 003-2019 Railway engineering high-performance dispersant using polycarboxylate superplasticizer

Publish Date: 2019-06-01 Implement Date: 2019-07-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/WHWX 003-2019

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Cement additives and admixtures

ICS Name: Concrete and concrete products

Publish Date: 2019-06-01

Implement Date: 2019-07-01

Scope

Scope: This standard specifies the terms and definitions, classification and marking, requirements, test methods, inspection rules, judgment rules, packaging, factory outlet, storage, and return of high-performance water-reducing agents based on polycarboxylic acid systems. This standard applies to high-performance water-reducing agents based on polycarboxylic acid systems used in railway concrete. Main technical content: Compared with the high-performance water-reducing agents in GB 8076, the technical indicators of pressure water-retention rate are added to the performance of the tested concrete, and the technical indicators of residual formaldehyde content are added to the general performance. The limit requirements for chloride ion content, total alkali content, and sodium sulfate content are also added. The technical requirements for water-reducing rate, air content, and compressive strength ratio are raised. In the classification, low-air-entraining type and high-air-entraining type are added. Compared with the high-performance water-reducing agents in TB/T 3275 and TB 10424, the technical requirements for water-reducing rate, water-retention rate ratio, pressure water-retention rate ratio, the amount of slump change after 1 hour, compressive strength ratio, chloride ion content, alkali content, and sodium sulfate content are raised. The technical indicator of residual formaldehyde content is also added.