CO2 emission reduction by reuse of building material waste in the Japanese cement industry

被引:141
作者
Oh, Da-Young [1 ]
Noguchi, Takafumi [1 ]
Kitagaki, Ryoma [1 ]
Park, Won-Jun [2 ]
机构
[1] Univ Tokyo, Dept Architecture, Tokyo, Japan
[2] Hanyang Univ, Sustainable Bldg Res Ctr, Ansan, South Korea
基金
新加坡国家研究基金会;
关键词
CO2 emission reduction; Cement industry; Recycling and reusing; Building material waste; RAW-MATERIALS; SAVINGS; CAPTURE;
D O I
10.1016/j.rser.2014.07.036
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
CO2 emitted from calcination processes in kilns comprises 60% of all emissions from cement production. The chemical components of building materials, demolished inorganic building materials (DIBMs), and waste concrete powder (WCP) are similar to those of cement minerals. Therefore, if DIBMs are used as a cement substitute material along with limestone, the quantity of disposed waste and the use of limestone will likely be reduced, as will CO2 emissions during cement production. This study proposes a recycling method for recycled cement, using DIBMs and WCP as cement substitute materials, and the properties of trial recycled cement were evaluated. The mortar specimen using recycled cement showed a high compressive strength, as did the ordinary Portland cement mortar. According to the proposed composition, the producible recycled cement was derived from 0.5% to 9.1% of annual cement production (about 57.6 million tons) in Japan. Additionally, the CO2 reduction by usage of recycled cement ranged from 0.06 million tons to 0.72 million tons from the total annual CO2 emissions from cement production (about 29.4 million tons), using natural resources in Japan. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:796 / 810
页数:15
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