Properties of Slurry Shield Tunnel Sand and Its Application in Large Flow Concrete

被引：6

作者：

Zierkailedi, Ba Hezhuoli Ke ^{[1
]}

Bian, Libo ^{[1
]}

Wang, Xiufang ^{[1
]}

Hu, Xingbo ^{[2
]}

Liu, Xuelei ^{[2
]}

Zhang, Zhi ^{[3
]}

机构：

[1] Beijing Univ Civil Engn & Architecture, Sch Civil & Traff Engn, Beijing 100044, Peoples R China

[2] Beijing Shou Fa Tian Ren Ecol Landscape Co Ltd, Beijing 100000, Peoples R China

[3] Beijing Shou Fa Expressway Construct Management C, Beijing 100000, Peoples R China

来源：

MATERIALS | 2022年 / 15卷 / 15期

关键词：

tunnel slag; slurry shield tunnel sand; clay and clay lumps; inert silt; mixed sand; workability; mechanical properties; durability; MECHANICAL-PROPERTIES; DRYING SHRINKAGE; DUNE SAND; MINERAL ADMIXTURES; DAMAGE MODEL; FINE; STRENGTH; CEMENT; REPLACEMENT; CARBONATION;

D O I：

10.3390/ma15155131

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The amount of Slurry shield tunnel slag (SSTS) from the Beijing East Sixth Ring Road renovation project is about 3 million m(3), and it is mainly fine and silt sand. In order to realize its resource utilization, the properties of SSTS and the performance of concrete with strength grades from C30-C60, which used the mixed sand compound with SSTS and Coarse Manufactured Sand (CMS) as a fine aggregate, were investigated. The results showed that SSTS' fineness modulus is 1.2, its clay content is 17.0% but its composition is mainly Inert Silt (IS), and SSTS replaced with 40% of the mass of CMS can obtain a mixed sand with a fineness modulus of 2.7 and a clay content of 7.0%. The morphological and filling effects of SSTS and IS will improve the workability and durability properties of concrete with no adverse effects on the compressive strength. On the other hand, clay lumps in SSTS adversely affect the workability, early cracking properties, and freeze resistance of concrete, which can be alleviated by dewatering and crushing the clay lumps in SSTS.

引用

页数：20

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