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Study on Effects of the Modification Method for the Durability of Adobe Wall Materials

Author: HaoChuanWen
Tutor: LiuJun
School: Shenyang University of construction
Course: Materials Processing Engineering
Keywords: Adobe Wall Materials Surface-doped Cement Modification Waterproof Agent Modified
CLC: TU521.3
Type: Master's thesis
Year: 2011
Downloads: 95
Quote: 0
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Abstract

Adobe wall material is made of adobe mixed with water into mud which can produce plastic deformation, then into a certain size mold to shape, using the sun’s light and heat drying. Adobe wall material is green building material, adobe is from the natural soil, not roasting, and a variety of sources. The adobe wall materials can be reused by crushing after adobe building demolition and can also return to farmland so that it can reduce resource waste and environmental pollution. This ecological advantage of sustainable development can not be replaced by any other material. Adobe wall material has natural advantages in the insulation, energy efficiency, renewable resource utilization, and its coordination with the natural environment is good.The main factors of use of adobe wall materials are the durability and strength. Nowadays, modification of adobe wall material of scholars at home and abroad are focused on the overall modification of adobe wall material, surface modification of the adobe wall materials is less. In this paper, adobe of Shanxi, Yunnan, Shanxi, Gansu, Inner Mongolia, Shenyang and other six regions were modified by surface doped. Compressive strength, water absorption, frost finance were tested, the feasibility of surface-doped modified approach and whether properties of adobe material by surface-doped modified can achieve the state performance index of adobe wall material requirements.In this paper, by the liquid and plastic limits and the XRD experiment of Shanxi, Yunnan, Shanxi, Gansu, Inner Mongolia, Shenyang and other six regions of adobe wall materials and the physical properties and mineral composition of the adobe wall materials in different parts were studied, the results show that the plasticity index of difference of adobe wall material in different regions is quite difference of between the mineral composition is different.Focus on the Low strength, poor water resistance and frost resistance and cement modified can change thermal insulation and so on, through the full-surface doped and surface doped on adobe of Shanxi, Yunnan, Shanxi, Gansu, Inner Mongolia, Shenyang and other six regions, compressive strength, water resistance, freeze-thaw resistance, and the degree of improvement of cement content in different modification methods on properties of the adobe wall material were studied. The results show that when the cement content is 4%-12%, compressive strength, water resistance, freeze-thaw resistance of the adobe wall materials were increased with the increase of cement content; properties of adobe wall material after surface doped modification meet the state performance requirements of non-bearing wall material.To further improve the water resistance , frost resistance, water repellent and waterproofing of adobe wall material through modified method of surface-doped agent and agent mixed with the cement on raw soil of Shaanxi, Yunnan, Shanxi, Gansu, Inner Mongolia, Shenyang and other areas ,material doped with modification, the influence of surface-doped waterproofing agent modification and surface-doped waterproofing agent mixed with the cement surface modified on degree of improvement of adobe wall material in different parts and whether these two modification means can be used in different regions. The results show that improvement degree of the single-doped waterproofing agent is small, waterproof agent mixed with cement can improve the performance of adobe wall material greatly.The results show that the modification method of surface-doped cement mixed with waterproof agent on adobe wall materials is feasible, surface-doped cement mixed with waterproof agent and surface-doped cement modification can not only improve the compressive strength, water resistance, frost resistance of adobe wall materials, but also not change its structure thermal insulation and so on. The adobe wall materials by surface-doped cement and surface-doped cement mixed with waterproof agent can meet relevant national requirements , and it provide theoretical and practical basis for adobe wall materials used in adobe building.

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