基于总功效系数法的自保温再生混凝土配合比优化

发布时间：2018-06-29 11:02

本文选题：总功效系数法 + 自保温再生混凝土　；参考：《四川建筑科学研究》2017年02期

【摘要】：基于总功效系数法,以抗压强度和导热系数为评价指标,选取水胶比、再生粗骨料取代率、再生细骨料取代率、玻化微珠体积掺量和活性化尾矿微粉掺量为关键影响因素,设计了自保温再生混凝土配合比正交试验,研究了各因素对其性能的影响。结果表明:玻化微珠体积掺量是影响抗压强度和导热系数的主要因素,抗压强度和导热系数随玻化微珠体积掺量的增加而降低;再生粗骨料取代率是影响抗压强度和导热系数的重要因素,抗压强度随再生粗骨料取代率的增加而降低,导热系数随再生粗骨料取代率的增加而先降低、后增加。通过设计优化,可获得28 d抗压强度达到19.0 MPa、导热系数为0.429 W/(m·K)的自保温再生混凝土。
[Abstract]:Based on the method of total efficiency coefficient and taking compressive strength and thermal conductivity as evaluation indexes, the key influencing factors are water / binder ratio, replacement rate of regenerated coarse aggregate, replacement rate of regenerated fine aggregate, volume content of vitrified microbeads and the content of activated tailings fine powder. The orthogonal test of mix ratio of self-insulating recycled concrete was designed, and the influence of various factors on its performance was studied. The results show that the volume content of glass beads is the main factor affecting the compressive strength and thermal conductivity, and the compressive strength and thermal conductivity decrease with the increase of the volume content of glass beads. The replacement rate of regenerated coarse aggregate is an important factor affecting the compressive strength and thermal conductivity. The compressive strength decreases with the increase of the replacement rate of regenerated coarse aggregate, and the thermal conductivity decreases first and then increases with the increase of the replacement rate of regenerated coarse aggregate. Through the design optimization, the self-insulating recycled concrete with 28 days compressive strength of 19.0 MPA and thermal conductivity of 0.429 W / (m K) can be obtained.
【作者单位】：三明学院建筑工程学院;河南中安建设工程有限公司;
【基金】：福建省科技计划引导性项目(2016Y0074) 三明学院科学研究发展基金福建省中青年教师教育科研项目(JAT160458;B201607)
【分类号】：TU528

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