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Showing papers in "The World of Building Materials in 2013"


Journal Article
TL;DR: In this paper, the physical and mechanics properties and its influencing factors, and the durability of Magnesia-phosphate Cement (MPC) are reviewed, which is composed of MgO powders,potassium phosphate(KH2PO4) and setting retarder(Na2B4O7·10H2O) and so on.
Abstract: Magnesia-phosphate Cement(MPC) is composed of MgO powders,potassium phosphate(KH2PO4) and setting retarder(Na2B4O7·10H2O) and so on.The advantages of MPC are fast setting and hardening,high early strength,high bonding strength,low shrinkage and high resistance of abrasion and freezing and so on.In this paper,the physical and mechanics properties and its influencing factors,and the durability of MPC are reviewed.

4 citations


Journal Article
TL;DR: For utilization of phosphorus slag, Zhang et al. as mentioned in this paper studied phosphorous slag as a raw material composition to improve clinker mineral structure, and the properties of the phosphorus and fluorine volatilization of slag by high temperature exhaust gas.
Abstract: Plenty of phosphorous slag are stacked in 2 500t/d cement production line of Xingshan Gezhouba Cement Co,LtdFor utilization of phosphorus slag,this paper studied phosphorous slag as a raw material composition to improve clinker mineral structure,the properties of phosphorus slag cement by grinding phosphorous slag alone,and to promote phosphorus and fluorine volatilization of phosphorous slag by high temperature exhaust gas and so onThese application technologies have obtained favorable technical and economic results

1 citations


Journal Article
TL;DR: In this case, the first factor plays a main role,on the basis of the matrix suction of unsaturated soil mechanics to exaggerate the shrinkable film surface tension effect as mentioned in this paper.
Abstract: Unsaturated soil is composed of five phase was proposed,including soil particles(including combined water film) the contact between the parts as the carrier of the effective stress.And absolute pressure on soil mechanics,introduced the principle of effective stress principle of unsaturated soil atmosphere of tension general formula and its special case.Analysis with tension atmosphere general formula of literature [1] laboratory tensile strength test of expansive soil,get with the reduced water content,soil particles closer,tensile strength increased soil sample there are three factors: combined water membrane contact area is increasing,and the combined water membrane intermolecular force and hydrogen bonding interaction increasing,the effect after the plastic limit increased sharply,free water and pore air constantly decreases,and the area of internal freedom of soil water and pore gas buoyancy offset surface air pressure capacity decreasing;contribute to increasing the surface tension of the shrinkable film,but only not shrinking film after strong bound water into the soil.In this case,the first factor plays a main role,on the basis of the matrix suction of unsaturated soil mechanics to exaggerate the shrinkable film surface tension effect.

1 citations


Journal Article
MO Lian-tong1
TL;DR: In this article, the authors provide an experimental evaluation on the mechanical properties of BJ200-Green asphalt plug joint materials, focusing on stability at high temperature and flexibility at low temperature of the binder and the joint mixture.
Abstract: This paper provides an experimental evaluation on the mechanical properties of BJ200-Green asphalt plug joint materials.Focus is on stability at high temperature and flexibility at low temperature of the binder and the joint mixture.Binder tests indicates that the softening point is 84 ℃,adhesion strength at low temperature is 0.85 MPa.The binder can relax 80% of initial force within 60 s,indicating good relaxation performance.Rutting test on the mixture shows that permanent deformation is less than 15% after subjected to 10 000 passes of wheel loading.Three point bending test indicates that the maximum bending strain at failure is larger than 20 000 μm/m.The data obtained confirms the good performance of mixture at high and low temperature.

1 citations


Journal Article
BO Qiang-lon1
TL;DR: In this paper, the improvement of the performance of industrial formulations on an alkali-free liquid accelerating agent with cement was investigated by the design and regulation of its chemical composition, and the results showed that the initial setting time and final setting time of the Portland cement added with 7%low-alkali liquid accelerating agents is 2.43min and 5.88min, and its 1dcompressive strength reaches 12.4MPa,28d compressive strength ratio is 94.84%.
Abstract: The improvement of the performance of the industrial formulations on an alkali-free liquid accelerating agent with cement was researched by the design and regulation of its chemical composition.The results show that the initial setting time and final setting time of the Portland cement added with 7%low-alkali liquid accelerating agent is 2.43min and 5.88min,and its 1dcompressive strength reaches 12.4MPa,28dcompressive strength ratio is 94.84%.

1 citations


Journal Article
TL;DR: In this paper, the authors introduced the general formula of tension atmospheric gravity stress effectively of unsaturated soil and showed that the ground atmospheric pressure reaction is greater than absolute buoyancy of pore air and water in unsaturated cohesive soil.
Abstract: This paper introduced the general formula of tension atmospheric gravity stress effectively of unsaturated soilAs a result of the existence of bound water film and the surface tension contraction membrane,the ground atmospheric pressure reaction is greater than absolute buoyancy of pore air and water in unsaturated cohesive soilThe extra parts is the tension atmospheric effective gravity stress difference of the result in classical water and soil parametersAlso because of this,the atmosphere tension effective gravity stress of unsaturated cohesive soil layer on the surface is usually not to zero

1 citations