Cao L.,Hubei University of Arts and Science |
Ren H.,Xingtai Xingheng Highway Management Bureau |
Zuo J.,Xingtai Xingheng Highway Management Bureau
Jianzhu Cailiao Xuebao/Journal of Building Materials | Year: 2014
Two types of textile fiber modified clay were prepared with used clothing. Through direct shear tests, California bearing ratio(CBR) tests and specifically designed ring cutting tests, mechanical properties of textile fiber modified clay were studied. The test results show that the horizontal shear strength of cotton fiber modified clay is significantly lower than that of plain clay due to the water absorption of cotton fiber. When the fiber content is 1.0%(by mass), the horizontal shear strength of chemical fiber modified clay witnesses a notable increase. When the fiber content is 0.6%(by mass), the cutting resistance of cotton fiber modified clay reaches the peak point. In contrast, the force of chemical fiber modified clay shows the monotonically increase with the increase of the fiber content. Larger water absorptive swelling will occur in cotton fiber modified clay, compared with that of chemical fiber modified clay. The CBR value of textile fiber modified clay slightly increases with a small amount of fiber added. In order to reduce water absorptive swelling, the additional compaction should be done on textile fiber modified clay. In short, the chemical fiber behaves more suitable for modification of clay than the cotton fiber in terms of mechanical properties.
Yan C.Y.,Hubei University of Arts and Science |
Li Z.H.,Xingtai Xingheng Highway Management Bureau |
Deng X.M.,China National Building Materials Group Corporation
Advanced Materials Research | Year: 2013
This paper presents a kind of ecological building mortar with a compressive strength of M5.0, M7.5 and M10, which includes waste residue as cementitious materials, and waste brick powder, waste mortar powder reclaimed sand instead of natural sand as aggregate. The test results shows that (1) mortar water consumption increase when recycled sand volume increases, but its water-retaining capacity goes up;(2)when different types of recycled sand are used instead of natural sand for middle and low strength mortar, there is no significant adverse effect on its strength, and the 28d compressive strength can all meet the designed strength requirements; (3) Little difference exists among the influence of different recycled sand on properties of mortar. © (2013) Trans Tech Publications, Switzerland.