Paper Title:
A Study on early Shrinkage of Recycled Concrete
  Abstract

The first 3d early shrinkage of recycled concrete from initial setting time with different replacement rates of recycled aggregate was investigated by self-made equipment. The differences between the unimproved recycled concrete and the improved one are observed, in the latter, new mixing method was utilized,that is, R-aggregates is coated with slag and nanoCaCO3, and relevant mechanism is analyzed. The results illustrate that early shrinkage of recycled concrete outweighs natural concrete, but there is not a definite link between the replacement rate of recycled aggregate and the early shrinkage. The treatment can effectively reduce the shrinkage of recycled concrete in 10h, but can not have a sustaining effort. Prewet treatment will generate water loss channels accelerating evaporation speed of water in concrete to accelerate shrinkage of concrete. The treatment can block water loss channel by coating, and slag and nanoCaCO3 can change pore structure and humidity in concrete to reduce the first10h early shrinkage.

  Info
Periodical
Edited by
Hui Wu, Xiao-Qian Qian, Chong-zhi Li and Fei Li
Pages
375-381
DOI
10.4028/www.scientific.net/KEM.477.375
Citation
C. Shen, X. Q. Qian, K. L. Qian, "A Study on early Shrinkage of Recycled Concrete", Key Engineering Materials, Vol. 477, pp. 375-381, 2011
Online since
April 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Jae Jun Kim, Sang Heum Youn, M.J. Cho, H.T. Shin, Jeong Bae Yoon, Kyu Hong Hwang, D.S. Lee
Abstract:To improve the mechanical properties of concretes containing recycled aggregates, pozzolanic materials were used to decrease the porosity of...
63
Authors: Z. X. Yang, Jeong Bae Yoon, J.O. Kim, Kyu Hong Hwang, B.S. Jun, J.B. Lee, M.C. Kim
Abstract:Porous concretes with continuous voids have been gaining more interest as an ecological material because of their useful functions such as...
227
Authors: Feng Li Liu, Jun Hua Liu, Cheng Zhi Zhang
Chapter 4: Building Materials and Processing Technology
Abstract:Research on performance of waste ceramics and ultra fine sand was carried on. And based on it, waste ceramics were crushed as recycled...
595