Jian Peng Zhang

An Overview of the Study and Application of Rubberized Portland Cement Concrete

This paper introduces an overview of the study and application of rubberized portland cement concrete. Comparing to plain concrete, rubberized portland cement concrete, which is widely used in highway, bridge, railway，civil architecture and military building, has small quality and good performance of durability, shock absorption and sound insulation. At present, the research of rubberized portland cement concrete is mostly fastened on performance of application. Founding consummate system info and research method of experience will promote the usage of rubberized portland cement concrete.

Cost Control and Management of the Project in the Design Phase

In this paper, existing problems of the project cost, and effective measures and methods of the control and management of the project cost in design stage are elaborated combined with the working practices that the author engaged in the construction and engineering design, project cost for many years.

Study on Tension and Compression Ratio and Discount Ratio of Rubber Modified Silica Fume Concrete

This paper conducted all kinds of performance testing of different rubber particle size and different dosage of silica fume rubber modified cement concrete under the condition of 10% the silicon ash content, such as: analysis research of compressive strength, splitting tensile strength, flexural strength, and pull off the pressure ratio and pressure ratio. Experimental results show that silica fume can improve rubber concrete compressive strength, splitting, bending strength, the folding ratio, adding silica fume concrete fracture pressure ratio and compression ratio are improved; the silica fume can effectively improve large brittleness and lack toughness of concrete, and improve the compactness of concrete.

Experimental Study on Basic Performance and Noise Characteristics of Rubber Cement Concrete with Silica Fume

This article has carried on the silicon ash content under the condition of 10%, and different rubber particle size and different dosage of silica fume rubber modified cement concrete in all kinds of performance testing, such as: the experiment research on compressive strength, splitting tensile strength, flexural strength and strong noise reduction performance. Experimental results show that silica fume can help improve the compression, splitting and flexural strength of rubber concrete, ratio of fracture and pressure and ratio of tension and compression of concrete are improved greatly after adding silica fume;With the increase of rubber particles, dynamic modulus of concrete decreased, noise reduction effect of silica fume concrete is significantly modified .

Experimental Research on Mechanical Behavior of Carbon Fiber Reinforced Concrete under Different Length of Carbon Fiber

To further study the mechanical properties of carbon fiber reinforced concrete (CFRC) about carbon fiber length, and determine the optimum length of the fiber. In this paper, based on the test, the enhancement effect of four different length of carbon fiber reinforced concrete is studied. Compressive strength curves and load-deformation curves of the test blocks mixing the different lengths carbon fiber are obtained. In the loading process, the change curve of the ratio of transverse strain and longitudinal strain are obtained. The results showed that the compressive strength increase and after decrease with the increase of fiber length. When the length of carbon fiber is 10 mm, the improved effect is best, and it can effectively improve the brittle failure of concrete. When the length of carbon fiber is more 30 mm, the improved effect of deformation of carbon fiber reinforced concrete is not obvious.

The Mechanical Properties of FRP Fabric Steel-Reinforced Concrete Columns

The mechanical properties of FRP steel-reinforced concrete columns are discussed. We study the constitutive relation of the concrete, based on the model and the experimental dates for the control the size of affecting parameters. When using the used model, the experimental dates can be reanalyzed and corrected for the intensity correct formula of FRP column. The ultimate bearing capacities of FRP constraint rectangular column use superposition principle to calculate the strength calculation. The ultimate bearing capacity of FRP column is divided into two parts: we conclude the big eccentric bearing capacity calculators formula by the columns bend. Through the study of the column, we concluded that the eccentric loading little eccentric calculation formula of bearing capacity. A case though using the example of this formula is similar with experiments results of the data.

Theoretical Analysis of Axial Compression of Reinforced Concrete Short-Columns Strengthened with CFRP Sheets

CFRP cloth strengthening concrete column is divided into constrained and unconstrained District area by the reasonable arch axis theory, then we obtain the effective confinement factor of reinforced columns, base on lateral stress formula of scholar XIAO Y and concrete compressive strength model of Karbhari, V. M, derive from the increasing coefficient of carrying capacity, according to the effective confinement factor and the increasing coefficient of carrying capacity, finally we obtain the bearing capacity formula of the modified compression column strengthened with CFRP sheets.

Experimental Research on Flexural Mechanical Behavior of Fiber Reinforced Concrete Flexural Members

Based on the cross-section bending of 5 carbon fiber concrete beams, the mechanism of deflection and strain of carbon fiber concrete beam were studied considering the variation of the length of carbon fiber and stirrup ratio. The experimental results show that the deflection of destruction increased with the increase of the length of the carbon fiber, and the effect of stirrup ratio on deflection and strain of beams is not obvious. The carbon fiber can effectively improve the brittle failure of concrete beam, and the stain of concrete accorded with that steel bar at the same height. According to the existing test model, the theoretical calculating formula of CFRC was proposed and applied for the cracking load calculation expression of CRFC beams, and theoretical calculated results agree well with experimental results.