Utilization of industrial waste powder as cementitious paste replacement to produce low-shrinkage concrete

Jiajian Chen , Wenxue Wang

Abstract

To ameliorate shrinkage problems in concrete, the most common route is to cut down the cementitious paste volume. This study proposed and demonstrated the strategy of filling industrial waste powder into the voids among aggregate particles in order to effectively fulfill the target of reduction in cementitious paste volume without air entrapment in concrete. The workability, strength and shrinkage of concrete mixes with 0-12.5% industrial waste powder content to replace cementitious paste at 0.35-0.60 water/cement ratio have been measured through slump, flow, cube strength, prism shrinkage tests. Results disclosed that utilization of industrial waste powder to replace cementitious paste significantly lowered the ultimate shrinkage strain by as high as 58.3% and prolong the shrinkage half-time by as high as 47.1%. In-depth analysis revealed that ultimate shrinkage strain was governed mainly by the cement content whereas shrinkage half-time was governed mainly by the water content.

Key Words

industrial waste powder; low-shrinkage concrete; powdery filler; shrinkage half-time; ultimate shrinkage strain

Address

Jiajian Chen — Department of Civil Engineering, Foshan University, Foshan, China
Wenxue Wang — Research Institute for Applied Mechanics, Kyushu University, Fukuoka, Japan

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