Drying shrinkage
Studies of Control on Cracks on Construction of High-Strength Concrete Ctructures
November 27, 2012 Engineering Science Road and sea transport
The current development in bridge architect is that bridge constructions are getting lighter and lighter. To achieve a light construction, high-strength concrete is used for pre-stressed concrete bridges, especially long-span beam bridges, in order to reduce the cross-section as well as the dead load of the bridges. It is well known that the dead load [...]
Autogenous shrinkage, crack control, curing, Drying shrinkage, High strength concrete, hydration heat control, internal curing
Research on the Physical and Mechanical Properties of Autoclaved Aerated Concrete Thermal Insulation Block
June 22, 2012 Engineering Science Architecture
Concrete block has become the main wall materials in China, because of its function of load-bearing and decorative. In order to meet the requirements of residential energy-saving standards, composite block with efficient insulation material should be used on the external wall. Howere there are variety shortcomings with thermal insulation blocks:(1) Low insulation performance, high cost,(2) [...]
aerated concrete, Compressive strength, Drying shrinkage, Energy Saving, heat transfer coefficient, insulation block
Effects of Pore Solution on the Drying Shrinkage of Hardened Cement Pastes and Its Mechanism
June 10, 2012 Engineering Science Architecture
The hardened cement paste is the primary deformation phase in concrete. The shrinkage of hardened cement paste is the origin of shrinkage of concrete. The hardened cement paste is a porous material. The pore structure and pore solution have a major impact on the drying shrinkage. The shrinkage may be different with the surface tension [...]
Drying shrinkage, hardened cement paste, pore solution, pore structure, Relative humidity
Effect of Mineral Admixture on Shrinkage and Mechanics of Concrete at Early Age
June 2, 2012 Engineering Science Architecture
Mineral admixtures have become an important component of modern concrete, and is highly related to much performance of concrete. This paper has discussed the effect of fly ash, phosphate slag.and silica fume on autogenous shrinkage, drying shrinkage, mechanics and crack of cement-based materials at early age. The author report a device which could test the [...]
Autogenous shrinkage, concrete, crack performance, Drying shrinkage, early age, Mechanics, mineral admixture
The Experimental Research on Regeneration Aggregate and Proportioning of Recycled Concrete Brick
May 18, 2012 Engineering Science Architecture
The construction waste Unprecedented increased with the construction industry rapid development. On the one hand construction wastes take up a lot of land, and causing serious environmental problems; On the other hand along with China’s GDP increases rapidly, the contradiction of national strength enhanced and sustainable development increasingly sharp. Recycled concrete brick is a kind [...]
Compressive strength, Drying shrinkage, durability, Production process, recycled aggregate, recycled concrete perforated brick, the crush index of recycled aggregate
Research on Asessment of Recycled Coarse Aggregates and Early Performance of Recycled Concrete
March 13, 2012 Engineering Science Architecture
As a kind of new building material, recycled aggregate concrete (RAC) has been applied in non-bearing structures in industrial and civil buildings, pavement engineering. The technology of RAC can not only reduce the environmental pollution brought by the waste concrete, but also can preserve the natural aggregate resources. It can bring us social benefit, economic [...]
Distribution law, Drying shrinkage, early strength, recycled aggregate concrete, Recycled coarse aggregate
Study on Repairing Material of Cement Concrete Pavement Which Based on Slag
March 3, 2012 Engineering Science Road and sea transport
The cement concrete pavement inevitably suffers from local damages such as broken slab or chipboard due to repeated external driving loading and constant effects of environmental factors. Traditional repairing materials usually result in higher cost and late traffic opening. The issue of fast local repair, therefore, bothers many practitioners when dealing with the maintenance of [...]
Cement clinker, cement concrete pavement, Compressive strength, Drying shrinkage, Fast repair material, rupture strength, setting time, Slag, sodium silicate alkali inspired
Study on the Crack Resistance of Concrete Bridges in High-cold Region of XinJiang
March 3, 2012 Engineering Science Road and sea transport
Cracks in concrete bridge is a common engineering problems which is difficult to solve. Cracks in concrete bridge is the concentrated expression of the bridge defects.Under harsh natural conditions in Xinjiang, especially in terms of mass concrete bridge is easy to appear crack, fissure and other cracking phenomenon. Once the cracking of concrete bridge, it [...]
Concrete bridges, crack resistance, Drying shrinkage, High-cold regions, Material composition paramenters, Plastic shrinkage, Temperature control anti-crack
Drying Shrinkage of Hardened Cement Paste and Its Relationship to the Microstructure
February 29, 2012 Engineering Science Architecture
Drying shrinkage is a typical source of distress in concrete structures in more ways than one. Drying shrinkage is typically non-uniform throughout a sample and this leads to cracking and warping, which in turn cause durability problems including mechanical or esthetic failure, and pathways for the ingress of corrosive ions.The shrinking component in concrete is [...]
cement paste, Drying shrinkage, microstructure, Relative humidity, stepwise drying
The Properties of Structure Insulating Wall Material
February 25, 2012 Engineering Science Architecture
The present research makes mix proportion design of Self-compacting lightweight aggregate concrete used in Structure insulating wall through theoritical analysis and orthogonal test method; evaluates the working performance of orthogonal test method through the tests of slump flow, J-ring and L-box; evalutes the mechanical properties of orthogonal test method through testing its cubic compressive strength [...]
Drying shrinkage, frost resistance performance, lightweight insulation mortar, linear expansion coefficient, self-compacting lightweight aggregate concrete
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