纳米再生保温混凝土微观形貌研究

通过对不同再生骨料掺量的纳米再生保温混凝土进行抗压强度以及微观形貌分析,对玻化微珠颗粒与水泥砂浆界面、天然骨料与水泥砂浆界面、再生骨料与水泥砂浆界面,以及微裂缝开展区域进行分析,从微观上对不同再生骨料替代率的保温混凝土表现的宏观力学性能进行解释。通过对比玻化微珠颗粒与气孔的微观形态,得出玻化微珠颗粒替代发泡气孔可减少混凝土强度损失,纳米矿粉的掺入对微裂缝有填充作用。

Microstructure Research on Nano Recycled Aggregate Thermal Insulation Concrete

This paper was to study the Nano recycled aggregate thermal insulation concrete (NRATIC) with the different replacement of recycled aggregate particles. These analysis were conducted that the compressive strength and microstructure of NRATIC, specifically, covering the interfacial transition zone (ITZ) between the glazed hollow bead (GHB) and cement paste, ITZ between natural aggregate and cement paste, ITZ between recycled aggregate and cement paste and cracks. The explanation on macro mechanical property of NRATIC was made from microscopic view. Based on the comparison between GHB and air holes on microstructure, this study demonstrated that GHB instead of air holes could reduce the losses of concrete strength, and the cracks could be filled by nano particles.