Effect of W/C Ratio on Durability and Porosity in Cement Mortar with Constant Cement Amount

Author:

Kim Yun-Yong1,Lee Kwang-Myung2,Bang Jin-Wook1,Kwon Seung-Jun3

Affiliation:

1. Department of Civil Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 305-764, Republic of Korea

2. Department of Civil and Environmental Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea

3. Department of Civil and Environmental Engineering, Hannam University, 99 Daehak-ro, Yuseong-gu, Daejeon 305-764, Republic of Korea

Abstract

Water is often added to concrete placing for easy workability and finishability in construction site. The additional mixing water can help easy mixing and workability but causes increased porosity, which yields degradation of durability and structural performances. In this paper, cement mortar samples with 0.45 of W/C (water to cement) ratio are prepared for control case and durability performances are evaluated with additional water from 0.45 to 0.60 of W/C. Several durability tests including strength, chloride diffusion, air permeability, saturation, and moisture diffusion are performed, and they are analyzed with changed porosity. The changing ratios and patterns of durability performance are evaluated considering pore size distribution, total porosity, and additional water content.

Funder

Ministry of Land, Infrastructure and Transport

Publisher

Hindawi Limited

Subject

General Engineering,General Materials Science

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