Open Access

ARTICLE

On the Preparation of Low-Temperature-Rise and Low-Shrinkage Concrete Based on Phosphorus Slag

by Jianlong Jin, Jingjing Ding, Long Xiong, Ming Bao, Peng Zeng^*

China Construction Ready Mixed Concrete Co., Ltd., Wuhan, 430000, China

* Corresponding Author: Peng Zeng. Email:

(This article belongs to the Special Issue: Advances in Solid Waste Processing and Recycling Technologies for Civil Engineering Materials)

Fluid Dynamics & Materials Processing 2024, 20(4), 803-814. https://doi.org/10.32604/fdmp.2023.027311

Received 24 October 2022; Accepted 20 February 2023; Issue published 28 March 2024

Abstract

The effects of different contents of a MgO expansive agent and phosphorus slag on the mechanical properties, shrinkage behavior, and the heat of hydration of concrete were studied. The slump flow, setting time, dry shrinkage, and hydration heat were used as sensitive parameters to assess the response of the considered specimens. As shown by the results, in general, with an increase in the phosphorus slag content, the hydration heat of concrete decreases for all ages, but the early strength displays a downward trend and the dry shrinkage rate increases. The 90-d strength and dry shrinkage of concrete could be improved with a phosphorus residue content between 0%–20%, with the best performances in terms of mechanical properties and shrinkage characteristics being achieved for a content of 20 kg/m³. On the basis of these results, it can be concluded that appropriate amounts of phosphorus slag and MgO expansive agent can be used to improve the compressive strength of concrete in the later stage by reducing the hydration heat and dry shrinkage rate, respectively.

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