T/JSAS 063-2024 Active Group standards

T/JSAS 063-2024 Alkali Slag-based Engineering Fill Material

Publish Date: 2024-10-23 Implement Date: 2024-11-01 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/JSAS 063-2024

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Groundwork and foundation engineering

ICS Name: Earthwork, excavation, foundation construction, and underground engineering

Publish Date: 2024-10-23

Implement Date: 2024-11-01

Scope

Scope: This document specifies the comprehensive utilization of alkali slag generated by the ammonia-soda process in the preparation of alkali slag-based backfill materials for engineering applications, including technical requirements, test methods, inspection rules, and requirements for packaging, marking, transportation, and storage. This document is primarily applicable to land reclamation in coastal areas. Main technical contents: 5.2 When conducting indoor mix proportion tests, materials should be mixed according to the design parameters using single-factor tests or orthogonal test schemes to determine the optimal mix ratio. 6. Technical requirements 6.1 Water content: The water content of alkali slag-based backfill materials should be controlled within 30%. 6.2 Homogeneity: The alkali slag-based backfill materials should be mixed uniformly without obvious color differences. 6.3 Strength indicators: The 7-day and 28-day unconfined compressive strength of alkali slag-based backfill materials should meet the requirements specified in Table 1. When required by the design, the 90-day unconfined compressive strength should also be provided. Table 1: Unconfined Compressive Strength Requirements for Alkali Slag-Based Backfill Materials Strength Class Unconfined Compressive Strength/MPa 7d 28d Low Strength (Grade III) ≥ 0.3 ≥ 1.0 Medium Strength (Grade II) ≥ 0.6 ≥ 2.0 High Strength (Grade I) ≥ 0.9 ≥ 3.0 6.4 Environmental indicators 6.4.1 Pollutant content: The pollutant content of alkali slag-based backfill materials should meet the limits specified in Table 1 of GB 36600 for Category II land selection. 6.4.2 Leachable pollutants: The pollutant content in the leachate of alkali slag-based backfill materials after 28 days of backfilling should meet the limits specified in GB/T 14848-2017 for Category IV. For heavy metals, refer to Table 3 of GB/T 30760-2024 for stricter requirements. Sulphate and chloride should not exc