再生混凝土的改性及其在钢管混凝土中应用的试验研究

The Experimental Study on Modified Property of Recycled Aggregate Concrete and Its Application in Concrete Filled Steel Tube

本文通过在再生、普通混凝土立方体试块以及再生、普通钢管混凝土中掺加干冰和聚异氰酸盐,研究了再生、普通混凝土立方体试块的力学性能和微观性能,并研究了再生、普通钢管混凝土的力学性能。研究表明,聚异氰酸盐对钢管混凝土的改性能力不是很明显,而干冰会破坏混凝土的强度。研究还表明,再生钢管混凝土与普通钢管混凝土的抗压能力基本一致。本研究属开拓性试验研究,目前国内外还没有相关的报道。

The article studies the mechanical property and microcosmic property of Recycled Aggregate Concrete （RAC） and Portland Concrete with dry ice and polyisocyanate. Meanwhile,the study involves in mechanical property of the RAC-Filled Steel Tube （RAC-FST） and the concrete filled steel tube （CFST） with dry ice and polyisocyanate. The results show that the modified property to CFST of polyisocyanate is not obvious and dry ice will reduce the strength of concrete. In addition,the change of the load—displacement of RAC-FST is similar to that of CFST. The research of the experiment is pioneering at home and abroad and the related reports have not been found currently.