Search | Engineering

订阅投稿

首页工程期刊工程焦点工程成就工程前沿关于我们 English

资源类型

期刊论文 2

年份

2022 1

2020 1

关键词

量子点元胞自动机（QCA）；全加器；行波进位加法器（RCA）；加/减电路；乘数 1

检索范围：

排序：展示方式：

Prediction on CO

Kaiwen HUANG, Ao LI, Bing XIA, Tao DING

《结构与土木工程前沿（英文）》 2020年第14卷第3期页码 746-759 doi: 10.1007/s11709-020-0635-2

摘要： Carbonation of concrete is a process which absorbs carbon dioxide (CO ). Recycled aggregate concrete (RAC) may own greater potential in CO uptake due to the faster carbonation rate than natural aggregate concrete (NAC). A quantitative model was employed to predict the CO uptake of RAC in this study. The carbonation of RAC and the specific surface area of recycled coarse aggregates (RCAs) were tested to verify accuracy of the quantitative model. Based on the verified model, results show that the CO uptake capacity increases with the increase of RCA replacement percentage. The CO uptake amount of 1 m C30 RAC within 50 years is 10.6, 13.8, 17.2, and 22.4 kg when the RCA replacement percentage is 30%, 50%, 70%, and 100%, respectively. The CO uptake by RCAs is remarkable and reaches 35.8%–64.3% of the total CO uptake by RAC when the RCA storage time being 30 days. Considering the fact that the amount of old hardened cement paste in RCAs is limited, there is an upper limit for the CO uptake of RCAs.

关键词： RAC CO₂ uptake carbonation specific surface area RCA