2015•Guisuanyan xuebaoRequires access

Shrinkage-reducing Measurement of High Strength Self-compacting Concrete

Yan Peiy

Abstract

The effect of dosage of shrinkage-reducing admixture(SRA)and super adsorbent polymer(SAP)on the workability,compressive strength and volume stability of C70 self-compacting concrete was investigated.The microstructure of hardened concrete containing SAP was analyzed to explain the shrinkage-reducing mechanism of SAP.The results show that SRA and SAP both can decrease the autogenous shrinkage of self-compacting concrete.SAP has higher shrinkage-reducing efficiency and less negative influence on the workability of concrete rather than SRA.The beginning time of autogenous shrinkage of high strength concrete with SAP delays and the shrinkage amount in the first day decreases,which can improve the anti-cracking property of concrete.SAP particles disperse uniformly in hardened concrete.The diameter of the pores in SAP particles formed by the release of water is mainly in a range of 50-70 nm.The porosity of concrete with SAP increases gently,affecting slightly the compressive strength of concrete.

About this research paper

What this paper is about

Why it matters

OpenAlex reports 8 citations for this work. Citation counts describe recorded attention and do not establish research quality.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

Key concepts: Shrinkage, Materials science, Compressive strength, Composite material, Cracking, Microstructure, Porosity, Superabsorbent polymer