Study on Improving the Properties of Recycled Aggregate by Microbial Mineralization

Author:

Wang Anhui1,Yi Haihe2,Zhan Qiwei3,Zhang Yongsheng4,Zhou Juanlan3

Affiliation:

1. China Construction Industrial & Energy Engineering Group Co., Ltd., Nanjing, 210046, China

2. School of Civil and Architecture Engineering, Shandong University of Technology, Zibo, 255000, China

3. School of Civil Engineering and Architecture, Jiangsu University of Science and Technology, Zhenjiang, 212100, China

4. Jiangsu Traffic Engineering Group Co., Ltd., Zhenjiang, 212100, China

Abstract

As one of the most widely used building materials, concrete consumed a lot of raw materials, and the comprehensive utilization of waste concrete had become a research hotspot. Firstly, the basic properties of recycled aggregate were studied, including crushing index, water absorption, apparent density and bulk density. The higher the amount of microorganism, the greater the basic properties. Secondly, the porosity of recycled aggregate was analyzed by MIP. With different microbial dosage, the decrease range of porosity was also different, and the decrease ranges were 15.87%, 27.74%, 31.98%, 32.19% and 35.10% respectively. Finally, the composition and microstructure of recycled aggregate were demonstrated by XRD, SEM and EDS. The results showed that mineralized product was calcium carbonate, and the surface layer of recycled aggregate formed a dense structure.

Publisher

American Scientific Publishers

Subject

General Materials Science

Reference14 articles.

1. Properties of concrete incorporating nano-silica;Said;Construction and Building Materials,(2012)

2. CO2 mineralisation of portland cement: Towards understanding the mechanisms of enforced carbonation;Zajac;Journal of CO2 Utilization,(2020)

3. The review and prospect based on recycled concrete;Bi;Applied Mechanics and Materials,(2012)

4. Strength analysis and validation of recycled aggregate concrete;Barhmaiah;Materials Today: Proceedings,(2020)

5. The slowdown in China’s carbon emissions growth in the new phase of economic development;Zheng;One Earth,(2019)

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3