| Author Name | Affiliation | Postcode | | Feng Yu | Department of Civil Engineering and Architecture, Anhui University of Technology, Ma’anshan 243032, Anhui, China | 243032 | | Xuliang Wang | China MCC17 Group Co., Ltd., Ma’anshan 243000, Anhui, China | 243032 | | Yang Zhang | Department of Civil Engineering and Architecture, Anhui University of Technology, Ma’anshan 243032, Anhui, China | 243032 | | Yuan Fang* | Department of Civil Engineering and Architecture, Anhui University of Technology, Ma’anshan 243032, Anhui, China | 243032 |
|
| Abstract: |
| To improve the utilization rate of steel slag, this paper investigates the expansion behavior of Full Aggregate Steel Slag Concrete (FASSC). Orthogonal experiment was performed to analyze the effects of sand ratio, water-cement ratio, steel slag sand content, replacement particle size of steel slag sand, coarse steel slag content, and replacement particle size of coarse steel slag on the expansion rate of FASSC. Test results demonstrated that the expansion rate of FASSC decreased with a gradual increase in the replacement particle size of steel slag sand or the coarse steel slag content. With a gradual increase in the water-cement ratio or the steel slag sand content, the expansion rate of FASSC first increased and then decreased. As the sand ratio increased, the expansion rate of FASSC first decreased and then increased. Among these, the steel slag sand content and the replacement particle size of steel slag sand significantly affected the expansion rate of FASSC. The mix proportions of SSC for self-stressing CFST and shrinkage compensating SSC were suggested according to the experimental research. Additionally, a formula for approximately predicting the expansion rate of FASSC was proposed based on the single factor weighted fitting. |
| Key words: steel slag concrete orthogonal experiment expansion behavior water-cement ratio sand ratio |
| DOI： |
| Clc Number:TU398 |
| Fund: |
|
| Descriptions in Chinese: |
| 为提高钢渣的利用率，开展全集料钢渣混凝土膨胀性能试验研究，采用正交试验方法，分析砂率、水灰比、钢渣砂含量、钢渣砂取代粒度、粗钢渣掺量及粗钢渣取代粒径等因素对全集料钢渣混凝土膨胀性能的影响。试验结果表明，随着钢渣砂取代粒径或粗钢渣掺量的逐渐增大，全集料钢渣混凝土膨胀率逐渐降低；随着水灰比或钢渣砂含量的逐渐增大，全集料钢渣混凝土膨胀率先增大后减小。钢渣砂含量和钢渣砂取代粒径对全集料钢渣混凝土的膨胀性能影响最为显著。在试验研究的基础上，充分利用钢渣的膨胀性能，合理建议自应力钢管混凝土和收缩补偿混凝土的配合比。基于单因素加权拟合方法，提出全集料钢渣混凝土膨胀率的近似预测公式。 |
