Application Of Self-compacting Concrete Research Articles

Advantages and Application of Self-Compacting Concrete in Bending Frame Structures

Advantages and Application of Self-Compacting Concrete in Bending Frame Structures

Experimental Study and Extended Finite Element Simulation of Fracture of Self-Compacting Rubberized Concrete

Self-compacting rubberized concrete (SCRC) is a high-performance concrete that can achieve compacting effect by self-gravity without vibration during pouring. Because of its excellent fluidity, homogeneity, and stability, the application of self-compacting concrete in engineering can improve work efficiency and reduce project cost. The effects of loading rate on the fracture behavior of self-compacting concrete were studied in this paper. Three-point bend (TPB) tests were carried out at five loading rates of 1, 0.1, 0.001, 0.0001, and 0.00001 mm/s. The dimensions of the specimens were 100 mm × 100 mm × 400 mm. A precast crack was set in the middle of the specimen with a notch-depth ratio of 0.4. The experimental results show that the peak load on the load-CMOD (crack mouth opening displacement) curve gradually increases with the increase of the loading rate. Although the fracture energy a presented greater dispersion under the loading rate of 1 mm/s, the overall changes were still rising with the increase of the loading rate. Besides studying the softening characteristics of the self-compacting concrete, the constitutive softening curve of the self-compacting concrete was obtained using the bilinear model. Finally, curved three-point bending beams were simulated by using the extended finite element method based on ABAQUS. The fracture process of the self-compacting concrete under different loading conditions was analyzed more intuitively. The simulation results were compared with the experimental results, and the same conclusions were obtained.

Application of Self-Compacting Concrete in Precast Structure Technology

The present article contains research results on the influence of the water-cement ratio and the content of dolomite powder in blended cement; as well as the influence of the mortar excess ratio on the properties of the self-compacting concrete for the precast structure technology. Workability of concrete mix, strength and shrinkage of the concrete were examined. It was established that the content of dolomite powder and water-cement ratio produce an approximately equal impact on the strength of the self-compacting concrete. The workability of the self-compacting concrete mix at the consumption of the dolomite powder at the level of 30-40% depends only on the ratio of mortar excess in the concrete. Heat treatment of self-compacting concrete at the temperature of 50 °C over the period of 16-20 hours allows to achieve the concrete strength of 35 MPa. After the 24-hour exposure to room conditions, the strength of these concretes reaches 25-40 MPa. Concretes with the use of dolomite powder have a higher shrinkage at low dosages of superplasticizer.

Application of Self-Compacting Concrete using Fly Ash to Prestressed Concrete outer Tank and Tackle to Improvement of Production Efficiency─Toyama Shinko Thermal Power Plant No.1 LNG Tank─

Application of Self-Compacting Concrete using Fly Ash to Prestressed Concrete outer Tank and Tackle to Improvement of Production Efficiency─Toyama Shinko Thermal Power Plant No.1 LNG Tank─

Identification of mechanical and fracture properties of self-compacting concrete beams with different types of steel fibres using inverse analysis

The application of self-compacting concrete has found wide use in practice. However, its application is often limited by lack of knowledge on material parameters gained from laboratory tests, which results in difficulties in the design of progressive building structures and buildings where non-linear finite element analysis should be used. The submitted paper presents results of identification of mechanical and fracture properties of selected self-compacting concrete beams applicable for non-linear finite element analyses. A procedure dealing with the determination of mechanical and fracture properties from an extensive series of tests on notched beams is also presented. The studied material is a high-performance concrete reinforced with two types and three volume ratios of steel fibres. An inverse analysis in combination with a multi-criterial analysis is used for evaluation of fracture-mechanical characteristics.

Experimental Studies on Basic Performance and Application of Self-Compacting Concrete Using Waste Brick Recycled Coarse Aggregate

With rapid economic development in China, the frequency of that new buildings replace old buildings increases gradually in rural areas, which inevitably results in the emergence of a large amount of waste clay brick. The processing of construction waste takes up a lot of land resources and worsen the existing rural environmental pollution situation. using waste clay brick to prepare recycled coarse aggregate concrete not only can effectively eliminate construction waste and reduce the consumption of original coarse aggregate and thus the cost of buildings, but also solves a series of environmental problems—it conforms to the concept of "green building" and stands in line with the strategic objectives of sustainable development. This paper researched on the influence of recycled coarse aggregate gradation and water cement ratio to the strength of recycled concrete at first, then experimentally verified the application feasibility of recycled coarse aggregate self-compacting concrete.

Influence of Superplasticizer and Water Cement Ratio on Rheological Characteristics of Fresh Self-Compacting Concrete

Yield stress and plastic viscosity are two basic parameters to describe the rheological characteristics of self-compacting concrete which would reflect the workability of self-compacting concrete quantificationally, the relationship between workability test results and rheological parameters was summarized, and the influence of superplasticizer and water cement ratio on rheological characteristics and of self-compacting concrete was studied by series experiments, the optimum water cement ratio and mixing amount of superplasticizer was proposed, this would guide the design and application of self-compacting concrete.

Influence of Blast Furnace Slag as Coarse Aggregate on Various Grades of Self Compacting Concrete

Self-compacting concrete (SCC) is a highly workable concrete that can flow through densely reinforced complex structural elements under its own weight and adequately fill all voids without vibration or mechanical consolidation. Effective use of industrial waste products in concrete gains many economic, environmental, and social benefits rather than disposing of it as waste. The objective of this study is to investigate the effect of blast furnace slag as a partial replacement for coarse aggregate in M20, M30 and M40 grades of fly ash blended self-compacting concrete. The coarse aggregate was replaced at a range of 30% by blast furnace slag aggregate and the various fresh and hardened concrete properties were determined and compared. From the results, it is recommended that 30% of slag aggregate can be effectively utilized for various self-compacting concrete applications.

Application of Self-Compacting Concrete (SCC) in the Execution of Reservoir of Water

Currently, the SCC is already used in several countries and is considered a breakthrough in the building process of concrete structures, as it increases productivity, reduces the demand for labor, work in time of concreting and improves the quality of the concrete and the environment work. Innumerous investigations on SCC [,[,[,[ have been developing in order to know their behavior, improve their properties and applicability in different structural elements. This paper presents the implementation of the SCC in the execution of the base of the waters reservoir, in water treatment station.

Synthesis, Properties and Engineering Applications of Green Energy-Saving Slump Retaining Agent

Introduce a green energy-saving slump retaining agent synthesis process, the slump retaining agent on IR characterization molecules ，which structure and design of the basic ideal molecular structure match.Test results show that：When Point-S polycarboxylate superplasticizer slump retaining agent complex mass ratio of 1:0.2, 2h slump when the variation amount is 30mm, to prevent the excessive concentration of concrete hydration heat, reduce cracks in concrete.The slump retaining agent complex products in Ping An International Financial Centre C60 successful application of self-compacting concrete.

Application of Self-Compacting Concrete in Strengthening of Existing Reinforced Concrete Column

The use of self-compacting concrete (SCC) is spreading worldwide due to its attractive properties in the fresh state as well as after hardening. Two application examples were introduced, one was reinforced concrete (RC) column strengthening with reinforced self-compacting concrete, and the other was with steel jacket and SCC. Economical and social benefits of the two application examples were analyzed. Project examples and applicable analysis show that RC column strengthening with SCC has attractive advantage, such as economy of technique, convenient construction, good construction quality, as well as bearing capacity improved significantly. The second strengthening method can make the best of advantage of SCC and steel material, and has strong global performance, high utilization ratio of the additional new materials, seismic behavior improved obviously, and so on.

Configuration of Low-Strength Self-Compacting Concrete Adapted to Local Raw Materials

C25 self-compacting concrete which meets the requirement of workability and strength grade is maked up by selecting local raw materials, using reasonable compound admixtures, based on c25 self-compacting concrete preliminary mixing proportion. we try to pursue an economical mixing ratio of the Low-strength Self-compacting Concrete which can adapt to the characteristics of the region's raw materials. The purpose is to promote the application of self-compacting concrete in region.

Long Age Mechanical Properties and Application of Self-Compacting Concrete

According to the need of a nuclear power station under construction, the preparation of C35, C50 self-compacting concrete(SCC) and their long age mechanics experiment were carried on. The test results between SCC and the vibrating concrete were compared. The test results indicated that the work ability and mechanical properties of SCC can satisfy the nuclear power station project. The long age mechanical properties were corresponding to the ones of vibrating concrete. The test results can be a reference of SCC research.

The Research and Application of Self-Compacting Concrete

Self-compacting concrete (SCC) has the environmentally friendly effect. The SCC can be prepared by using the technical approaches of “Double adding” (adding mineral admixtures and chemical admixtures and) low W/B (the ratio of water to composite binder). According to the requirements of design and construction, SCC of C30～C60 can be produced by selecting materials used and adjusting the amount and composition of composite binder, the dosage and composition of high performance chemical admixture as well as W/B, based on the reasonable component of SCC with volume. It had been applied successfully in some construction works in several, such as concrete filled steel pipe column and strengthening of concrete structure.

Blowing agents for polycarbonate

The application of self-compacting concrete has found wide use in practice. However, its application is often limited by lack of knowledge on material parameters gained from laboratory tests, which results in difficulties in the design of progressive building structures and buildings where non-linear finite element analysis should be used. The submitted paper presents results of identification of mechanical and fracture properties of selected self-compacting concrete beams applicable for non-linear finite element analyses. A procedure dealing with the determination of mechanical and fracture properties from an extensive series of tests on notched beams is also presented. The studied material is a high-performance concrete reinforced with two types and three volume ratios of steel fibres. An inverse analysis in combination with a multi-criterial analysis is used for evaluation of fracture-mechanical characteristics.