Using microbial carbonate precipitation to improve the properties of recycled fine aggregate and mortar

被引：69
作者：
Feng, Zhangyao [1 ]
Zhao, Yuxi [1 ]
Zeng, Weilai [1 ]
Lu, Zhenmei [2 ]
Shah, Surendra P. [3 ]
机构：
[1] Zhejiang Univ, Inst Struct Engn, Hangzhou 310058, Zhejiang, Peoples R China
[2] Zhejiang Univ, Inst Microbiol, Hangzhou 310058, Zhejiang, Peoples R China
[3] Northwestern Univ, Ctr Adv Cement Based Mat, Evanston, IL 60208 USA
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2020年 / 230卷
基金：
中国国家自然科学基金;
关键词：
Recycled fine aggregate; Microbial carbonate precipitation; Bio-deposition modification; DURABILITY PROPERTIES; NANO-SILICA; MECHANICAL-PROPERTIES; CONCRETE AGGREGATE; UREASE ACTIVITY; STRENGTH; CO2; MICROSTRUCTURE; CONSTRUCTION; QUALITY;
D O I：
10.1016/j.conbuildmat.2019.116949
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This study investigates the use of microbial carbonate precipitation (MCP) by Sporosarcina pasteurii (S. pasteurii) to improve the properties of recycled fine aggregate (RFA). The factors influencing MCP are experimentally investigated. The recommended precipitation conditions for the pH, bacteria concentration, and calcium concentration are determined to be 9.5, 10(8) cells/mL, and 0.55 mol/L, respectively. Under these proposed conditions, the effects of MCP modification on RFA are also investigated and found the weight of modified RFA increases and the water absorption of modified RFA decreases. The flexural strength and compressive strength of mortar specimens cast by modified aggregate are improved. The result confirms the positive effects of MCP for improving the properties of RFA. (C) 2019 Elsevier Ltd. All rights reserved.
引用
收藏
页数：8
相关论文
共 39 条
[1]  
[Anonymous], 159811995 GB
[2]  
[Anonymous], GBT251762010
[3]  
[Anonymous], 2015, Advancing Sustainable Materials Management: Facts and Figures 2013
[4]   Urease activity in microbiologically-induced calcite precipitation [J].
Bachmeier, KL ;
Williams, AE ;
Warmington, JR ;
Bang, SS .
JOURNAL OF BIOTECHNOLOGY, 2002, 93 (02) :171-181
[5]   Sporosarcina pasteurii use in extreme alkaline conditions for recycling solid industrial wastes [J].
Cuzman, Oana A. ;
Rescic, Silvia ;
Richter, Katharina ;
Wittig, Linda ;
Tiano, Piero .
JOURNAL OF BIOTECHNOLOGY, 2015, 214 :49-56
[6]  
Eurostat, 2017, GEN WAST WAST CAT HA
[7]   Mechanical behaviour of concrete made with fine recycled concrete aggregates [J].
Evangelista, L. ;
de Brito, J. .
CEMENT & CONCRETE COMPOSITES, 2007, 29 (05) :397-401
[8]   Durability performance of concrete made with fine recycled concrete aggregates [J].
Evangelista, L. ;
de Brito, J. .
CEMENT & CONCRETE COMPOSITES, 2010, 32 (01) :9-14
[9]   Properties of concrete incorporating fine recycled aggregates from crushed concrete wastes [J].
Fan, Cheng-Chih ;
Huang, Ran ;
Hwang, Howard ;
Chao, Sao-Jeng .
CONSTRUCTION AND BUILDING MATERIALS, 2016, 112 :708-715
[10]   Quality improvement of mixed and ceramic recycled aggregates by biodeposition of calcium carbonate [J].
Garcia-Gonzalez, Julia ;
Rodriguez-Robles, Desiree ;
Wang, Jianyun ;
De Belie, Nele ;
Ma Moran-del Pozo, Julia ;
Ignacio Guerra-Romero, M. ;
Juan-Valdes, Andres .
CONSTRUCTION AND BUILDING MATERIALS, 2017, 154 :1015-1023
1234