Experimental Study On PK Multifunctional Concrete Hollow Block

Concrete hollow block is a kind of widely used wall material, which owns excellent properties, containing energy conservation, land saving, environmental protection, high-strength, light weight, abundant material, efficient production, various species and so on. However, its industrial application has been limited mainly by the following three factors, namely, poor insulation effect, easy to crack, leakage. These problems seriously affect the normal use of the masonry housing, thus affecting the building block's further promotion. In light of these problems, the task group has developed a new type of multi-functional concrete hollow block– PK multifunctional concrete hollow block. The following aspects of the block were studied in this article:(1) The Introduction briefly described the development trend, research background and significance of the concrete hollow block. The research topic of the PK multifunctional concrete hollow block was also presented.(2) Physical properties of the PK multifunctional concrete hollow block were studied comprehensively, namely, density, void ratio, water content, water absorption, the relative water content, penetration-resistant, shrinkage degree, compressive strength, heat resistance, heat transfer coefficient and so on. The compressive strength of a single block and the thermal properties of the wall were discussed. And then the corresponding calculation methods and improved measures were presented.(3) Axial compressive strength and shear strength of bed joint of masonry of the PK multifunctional concrete hollow block were studied. Many properties of the masonry were tested in the experiments, such as compressive strength, stress-strain relationship, elastic modulus, shear strength. According to these experimental results, a reasonable construction proposal was proposed and a calculation method of shear strength of the masonry was greatly improved.(4) The earthquake-resistant experiment of the frame– PK multifunctional concrete hollow block wall was implemented. And then many properties of the frame under effect of the low cyclic load were studied, such as failure mechanism, ultimate resistance, ultimate turn eagle, hysteresis curve, skeleton curve, ductility parameter. Based on the testing results, earthquake-resistant capability of the frame-wall was evaluated.(5) The main conclusions were showed in the last paragraph of this article. Further study fields of the PK multifunctional concrete hollow block were also noted in the end.