多排孔陶粒混凝土空心砌块砌体基本性能研究
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摘要
多排孔陶粒混凝土空心砌块是一种新型墙体材料,可作为既保温又承重的材料在夏热冬冷地区推广,因此有必要对多排孔陶粒混凝土空心砌块砌体的基本力学性能和保温隔热性能作进一步的研究。本文通过多排孔陶粒混凝土空心砌块砌体基本力学性能和保温隔热性能的试验及理论分析获得了一些有益的成果。
通过对36个多排孔陶粒混凝土空心砌块砌体的抗压试验结果的分析可以得出:多排孔陶粒混凝土空心砌块砌体的抗压强度比普通混凝土小型砌块砌体的强度要高。基于本文的试验结果,分析了多排孔陶粒混凝土空心砌块砌体抗压强度的影响因素,采用应力法建立了多排孔陶粒混凝土空心砌块砌体的抗压强度理论公式,并将空心率影响系数引入到抗压强度计算式中,这个公式的计算结果与试验值吻合较好,对现行规范规定的抗压强度公式有较大改进。此外,文中还提出了多排孔陶粒混凝土空心砌块砌体的应力—应变全曲线公式以及弹性模量取值。
通过对72个多排孔陶粒混凝土空心砌块砌体的抗剪试验结果的分析可以得出:多排孔陶粒混凝土空心砌块砌体的抗剪强度比普通混凝土小型砌块砌体的强度要高,主要原因是空心率小于35%的盲孔陶粒混凝土空心砌块存在销栓作用。将刚塑性极限分析理论和最小耗能原理相结合得出多排孔陶粒混凝土空心砌块砌体的销栓作用大小,以此为基础建立了考虑空心率影响的多排孔陶粒混凝土空心砌体抗剪强度计算公式。该公式的计算结果与试验值较吻合,可供工程设计和规范修订作参考。
通过对多排孔陶粒混凝土空心砌块砌体保温隔热性能的理论分析和测定多排孔陶粒混凝土空心砌块砌体的传热系数,得出结论:多排孔陶粒混凝土空心砌块砌体能满足夏热冬冷地区节能50%的要求,施工工艺简单,从墙体保温体系的发展趋势来看,该体系必将成为未来主要的保温方式。
本文的成果可供多排孔陶粒混凝土空心砌块砌体结构设计和理论研究参考。
Multi-hole ceramsite concrete hollow block is a new type wall materials and products can be promoted as both insulation and load-bearing materials in the hot summer and cold winter zone, it is necessary to study the fundamental mechanical behavior and thermal insulation properties of multi-hole ceramsite concrete hollow block masonry for further. Based on the experiments and theoretical analysis of fundamental mechanical behavior and thermal insulation properties to the multi-hole ceramsite concrete hollow block masonry obtained some useful results.
Through analyse the experimental results of 36 multi-hole ceramsite concrete hollow block masonry compressive specimens,it can be drawned: The compressive strength of the multi-hole ceramsite concrete hollow block masonry is higher than which of ordinary concrete hollow block masonry.Based on the experimental results in this paper analyzed the main factors influencing the compressive strength of multi-hole ceramsite concrete hollow block masonry,the stress method is used to establish a theoretical formula of the multi-hole ceramsite concrete hollow block masonry's compressive strength,introducing the void ratio influence coefficient to this formula, the calculated result of this formula is coincide with experimental result,so it is much improved to the present code method. Moreover, the stress-strain whole curve formula of multi-hole ceramsite concrete hollow block masonry and the value of elastic modulus are achieved in the paper.
Through analyse the experimental results of 72 multi-hole ceramsite concrete hollow block masonry shear specimens ,it can be drawned: The shear strength of the multi-hole ceramsite concrete hollow block masonry is higher than which of ordinary concrete hollow block masonry.The mainly reason is the mortar's pin key action are found in the blind hole ceramsite concrete hollow block that the hole rate is less than 35%.Combining rigid-plastic ultimate theory and least energy consumption principle, the value of pin-key action can be attained, and base on it, the shear strength formula considering the hole rate influence of multi-hole ceramsite concrete hollow block masonry is established. The calculated result of formula is coincided with experimental result, so the formula is provided as reference for engineering design and code revise.
Based on the theoretical analysis of the multi-hole ceramsite concrete hollow block's insulation properties and the determination of the multi-hole ceramsite concrete hollow block masonry's heat transfer coefficient, it can be drawned:ceramsite concrete hollow block masonry can meet the requirements of energy saving 50% in hot summer and cold winter zone, the construction process is simple, along with the development of the wall insulation system , this system will become the main way of insulation in the future.
The results of the paper can be used to reference for design of Multi-hole ceramsite concrete hollow block masonry's structure design and the theoretical research.
通过对36个多排孔陶粒混凝土空心砌块砌体的抗压试验结果的分析可以得出:多排孔陶粒混凝土空心砌块砌体的抗压强度比普通混凝土小型砌块砌体的强度要高。基于本文的试验结果,分析了多排孔陶粒混凝土空心砌块砌体抗压强度的影响因素,采用应力法建立了多排孔陶粒混凝土空心砌块砌体的抗压强度理论公式,并将空心率影响系数引入到抗压强度计算式中,这个公式的计算结果与试验值吻合较好,对现行规范规定的抗压强度公式有较大改进。此外,文中还提出了多排孔陶粒混凝土空心砌块砌体的应力—应变全曲线公式以及弹性模量取值。
通过对72个多排孔陶粒混凝土空心砌块砌体的抗剪试验结果的分析可以得出:多排孔陶粒混凝土空心砌块砌体的抗剪强度比普通混凝土小型砌块砌体的强度要高,主要原因是空心率小于35%的盲孔陶粒混凝土空心砌块存在销栓作用。将刚塑性极限分析理论和最小耗能原理相结合得出多排孔陶粒混凝土空心砌块砌体的销栓作用大小,以此为基础建立了考虑空心率影响的多排孔陶粒混凝土空心砌体抗剪强度计算公式。该公式的计算结果与试验值较吻合,可供工程设计和规范修订作参考。
通过对多排孔陶粒混凝土空心砌块砌体保温隔热性能的理论分析和测定多排孔陶粒混凝土空心砌块砌体的传热系数,得出结论:多排孔陶粒混凝土空心砌块砌体能满足夏热冬冷地区节能50%的要求,施工工艺简单,从墙体保温体系的发展趋势来看,该体系必将成为未来主要的保温方式。
本文的成果可供多排孔陶粒混凝土空心砌块砌体结构设计和理论研究参考。
Multi-hole ceramsite concrete hollow block is a new type wall materials and products can be promoted as both insulation and load-bearing materials in the hot summer and cold winter zone, it is necessary to study the fundamental mechanical behavior and thermal insulation properties of multi-hole ceramsite concrete hollow block masonry for further. Based on the experiments and theoretical analysis of fundamental mechanical behavior and thermal insulation properties to the multi-hole ceramsite concrete hollow block masonry obtained some useful results.
Through analyse the experimental results of 36 multi-hole ceramsite concrete hollow block masonry compressive specimens,it can be drawned: The compressive strength of the multi-hole ceramsite concrete hollow block masonry is higher than which of ordinary concrete hollow block masonry.Based on the experimental results in this paper analyzed the main factors influencing the compressive strength of multi-hole ceramsite concrete hollow block masonry,the stress method is used to establish a theoretical formula of the multi-hole ceramsite concrete hollow block masonry's compressive strength,introducing the void ratio influence coefficient to this formula, the calculated result of this formula is coincide with experimental result,so it is much improved to the present code method. Moreover, the stress-strain whole curve formula of multi-hole ceramsite concrete hollow block masonry and the value of elastic modulus are achieved in the paper.
Through analyse the experimental results of 72 multi-hole ceramsite concrete hollow block masonry shear specimens ,it can be drawned: The shear strength of the multi-hole ceramsite concrete hollow block masonry is higher than which of ordinary concrete hollow block masonry.The mainly reason is the mortar's pin key action are found in the blind hole ceramsite concrete hollow block that the hole rate is less than 35%.Combining rigid-plastic ultimate theory and least energy consumption principle, the value of pin-key action can be attained, and base on it, the shear strength formula considering the hole rate influence of multi-hole ceramsite concrete hollow block masonry is established. The calculated result of formula is coincided with experimental result, so the formula is provided as reference for engineering design and code revise.
Based on the theoretical analysis of the multi-hole ceramsite concrete hollow block's insulation properties and the determination of the multi-hole ceramsite concrete hollow block masonry's heat transfer coefficient, it can be drawned:ceramsite concrete hollow block masonry can meet the requirements of energy saving 50% in hot summer and cold winter zone, the construction process is simple, along with the development of the wall insulation system , this system will become the main way of insulation in the future.
The results of the paper can be used to reference for design of Multi-hole ceramsite concrete hollow block masonry's structure design and the theoretical research.
引文
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