Thermal performance study of self-thermal insulation & recycled concrete hollow block

被引：0

作者：

Zheng, Jian-Lan ^{[1
,2
]}

Zhang, Hui-Zhi ^{[3
,4
]}

机构：

[1] College of Engineering, Fujian Jiangxia University, Fuzhou, 350108, Fujian

[2] Fujian Province Collaborative Innovation Center for Environmentally Friendly and Energy Saving High Performance Concrete, Fuzhou, 350108, Fujian

[3] College of Civil Engineering, Fuzhou University, Fuzhou, 350108, Fujian

[4] College of Architecture and Civil Engineering, Sanming University, Sanming, 365004, Fujian

来源：

Gongcheng Lixue/Engineering Mechanics | 2015年 / 32卷 / 05期

关键词：

Hollow block; Numerical simulation; Recycled concrete; Self-thermal insulation; Thermal conductivity; Thermal performance;

D O I：

10.6052/j.issn.1000-4750.2013.11.1021

中图分类号：

学科分类号：

摘要：

With 100% recycled coarse aggregates replacement, and recycled fine aggregates and glazed hollow bead volume replacement rate as main variables, the thermal conductivity of self-thermal insulation & recycled concrete is studied. The recycled fine aggregates substituted rate is 0%, 50%, 100%, respectively, and the glazed hollow bead volume replacement rate is 60%~120%. The multiple factors effect of thermal insulation & recycled concrete are revealed, and the optimized concrete mix with excellent general performance is gained. Then the thermal performance of self-thermal insulation & recycled concrete hollow block masonry is studied. Combined with theory calculation and numerical simulation analysis, the thermal performance of self-thermal insulation & recycled concrete hollow block masonry and formal concrete hollow block masonry are compared and analyzed. The results show that: The thermal resistance of self-thermal insulation & recycled concrete hollow block masonry increases 41.9% than that of formal concrete hollow block masonry; under the condition of 230C temperature difference of indoor and outside, the formal concrete hollow block masonry temperature rise are 44.9% higher than the self-thermal insulation & recycled concrete hollow block masonry after 1 hour; the self-thermal insulation & recycled concrete hollow block masonry is qualified for 65% energy-saving with 20mm insulation mortar external rendering and 20mm insulation mortar internal rendering. ©, 2015, Tsinghua University. All right reserved.

引用

页码：51 / 56

页数：5

共 14 条

[1]

Wang Z., Qian J., Wang Q., Et al., Pass design of saving concrete perforated brick and thermal analysis, New Building Materials, 2, pp. 43-46, (2008)

[2]

Hu D., Insulation performance study of building block based on the heat transfer coefficient optimization design in Fujian Province, Wall Material Innovation & Energy Saving in Buildings, 1, 1, pp. 27-43, (2011)

[3]

Sun J., Fang L., Numerical simulation of concrete hollow bricks by the finite volume method, International Journal of Heat and Mass Transfer, 52, 22-23, pp. 5598-5607, (2009)

[4]

Bouchairy A., State theoretical model of fired clay hollow bricks for enhanced external wall thermal insulation, Building & Environment, 43, 10, pp. 1603-1618, (2008)

[5]

Xiao J., Li J., Study on relationships between strength indexes of recycled concrete, Journal of Building Materials, 8, 2, pp. 197-201, (2005)

[6]

Wang B., Bai G., Dai H., Et al., Experimental and mechanical analysis of bond-slip performance between recycled concrete and rebar, Engineering Mechanics, 20, 10, pp. 54-64, (2013)

[7]

Chen A., Zhang Q., Wang J., Et al., Freez-thaw cycle test and a damage mechanics model for recycled concrete, Engineering Mechanics, 26, 11, pp. 102-107, (2009)

[8]

Zhang H., Zheng J., Influencing factors on compressive strength and working properties of recycled concrete, Journal of Fuzhou University (Natural Science Edition), 40, 4, pp. 508-514, (2012)

[9]

Tam V.W.Y., Optimization on proportion for recycled aggregate in concrete using two-stage mixing approach, Cement and Concrete Research, 21, 10, pp. 1928-1939, (2007)

[10]

Zhang Z., Dong Y., Li Z., Experimental study on thermal insulation glazed hollow bead concrete, New Building Materials, 11, pp. 73-74, (2007)

← 1 2 →