Civil Engineering

Pu Xincheng's Super high strength, high performance concrete PDF

Posted On April 20, 2018 at 3:49 pm by / Comments Off on Pu Xincheng's Super high strength, high performance concrete PDF

By Pu Xincheng

ISBN-10: 041551715X

ISBN-13: 9780415517157

Content material: sleek civil engineering and smooth concrete -- methods and rules -- vital results of energetic mineral admixtures -- research of the pozzolanic impression and power composition -- uncooked fabrics -- the issues with instruction innovations -- constitution -- power and deformation houses -- toughness -- try out tools -- functions, trials, and customers

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Additional info for Super high strength, high performance concrete

Sample text

A second explanation is the theory of diffusion double layer,10 where after addition of water to the cement, the reaction of C3A and C3S at the surface of the cement particle with water releases cations such as alkalis and Ca2+ which diffuse faster than anions such as H 2SiO42– and AlOH4– , so on the surface of the cement particle, the concentration of anions is higher than that of cations forming a negatively charged layer. Ca 2+ and other cations are adsorbed onto the surface of the cement particle to form an adsorbed layer, its thickness being δ.

In its fresh state, the concrete should be flowable with good adhesion, it can be placed without segregation or stratification, and it has excellent performance in construction work. The hardened concrete should have high strength. Since strength is the basic property of concrete, ordinary low strength concrete cannot be considered high performance concrete. This does not mean that for ordinary concrete, a good working performance and sufficient durability may be neglected. The hardened concrete should have high volume stability, that is, low shrinkage and low creep.

This requires production of super-­high-­strength high performance concrete. 25 MPa/­kg, that is, by 150%. In addition, this enhanced strength increase allows the sand, stone, and other materials to play their full role in strength and all materials can be used effectively. 2) allow the volume of materials to be reduced significantly and the energy consumption for processing and transportation of these materials to decrease accordingly. Modern civil engineering and modern concrete 13 Therefore, development of super-­high-­strength high performance concrete can reduce the effect the cement industry has on the environment.

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Super high strength, high performance concrete by Pu Xincheng


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