文献类型：期刊文献

英文题名：Predicting method for time-dependent concrete carbonation depth (II): Improved empirical simulating formula

作者：Wang, Wei[1]; Shu, Zhijian[2]; Zheng, Qiang[1]; Cheng, Chunyang[1]; Jin, Weimin[1]

机构：[1] School of Engineering, Shaoxing University, Shaoxing, China; [2] School of Engineering, Lishui University, Lishui, China

年份：2013

卷号：18 L

起止页码：2309

外文期刊名：Electronic Journal of Geotechnical Engineering

收录：EI(收录号：20133516684007)、Scopus(收录号：2-s2.0-84883039944)

语种：英文

外文关键词：Carbon dioxide - Carbonation - Fly ash

外文摘要：Empirical simulating formula for time-dependent carbonation depth of concrete are studied based on k-0.5 model and k-m model. Advantage of the k-m model is discussed which can reduce even eliminate the X-shape distributed simulating error of the traditional k-0.5 model. According to the basic k-m model, three improved four-parameter empirical formulae are presented to simulate time-dependent carbonation depth of different kind concrete. First of all, empirical k-m-CS formula is put forward to describe carbonation behaviour of concrete with different compressive strength. Then, empirical k-m-CC formula is proposed to simulate this behaviour of concrete subjected to various carbon dioxide concentrations. Lastly, empirical km- RF formula is established to predict the behaviour of concrete with different replacing ratio of fly ash. Approaches to determine the parameters in the empirical formulae are suggested in detail. Simulating error of presented empirical formula is much smaller than that of the k-0.5 model based formula. Finally, good agreements have been found between investigated carbonation data and improved empirical formulae simulations. ? 2013, EJGE.