Experimental Research on Compressive Strength of Pumice Concrete and Volcanic Concrete Wall

2014 ◽  
Vol 919-921 ◽  
pp. 1801-1804 ◽  
Author(s):  
Li Jun Dou ◽  
Min Zhang ◽  
Ming Yu Xu
Keyword(s):  
Compressive Strength ◽  
Bearing Capacity ◽  
Experimental Research ◽  
Residential Building ◽  
Masonry Structure ◽  
Experimental Results ◽  
Concrete Wall

Pumice concrete and volcanic concrete used in low-rise rural residential building more and more. In order to better realize the pumice concrete wall and cinder concrete wall compressive strength, respectively to make three slices of pumice concrete wall and three slices of cinder concrete wall, wall compressive experiment was carried out. The experimental results showed that the compressive strength of pumice concrete wall and volcanic concrete wall meet the requirements of the bearing capacity of masonry structure.

Test of Fire Response of a Profiled Sheet-Ceramsite Concrete Composite Floor

2011 ◽  
Vol 255-260 ◽  
pp. 255-258
Author(s):  
Xin Tang Wang ◽  
Hai Jiang Wang ◽  
Ming Zhou ◽  
Yao Ji
Keyword(s):  
Bearing Capacity ◽  
Experimental Research ◽  
Experimental Results ◽  
Great Change ◽  
Fire Response ◽  
Fire Load ◽  
Distributed Load ◽  
Bending Capacity ◽  
Fire Characteristics

For study of the post-fire characteristics of the profiled sheet-ceramsite concrete composite floor (noted as PSCCF) subjected to fire load, the experimental research on post-fire bearing capacity of a PSCCF after fire is carried out. Based on the experimental results, effect of the fire on post-fire bearing capacity of the profiled sheet-ceramsite concrete composite floor is discussed, and the failure phenomenon and mechanism are analyzed. It is shown that the failure form of the profiled sheet-ceramsite concrete composite floor after fire has great change compared with the floor not subjected to fire load, but the composite floor subjected to fire still exhibits higher bending capacity, and the ultimate value of the equivalent distributed load is up to 25kN/m2, which may be used as basis of strengthening and repairing of the profiled sheet-ceramsite concrete composite floor after exposure to fire.

Experimental Research on Fire Response and Post-Fire Bearing Capacity of Profiled Sheet-Ceramsite Concrete Composite Floor

2010 ◽  
Vol 168-170 ◽  
pp. 679-684
Author(s):  
Xin Tang Wang ◽  
Hai Jiang Wang ◽  
Ming Zhou
Keyword(s):  
High Temperature ◽  
Bearing Capacity ◽  
Experimental Research ◽  
Experimental Results ◽  
Fire Response ◽  
Fire Load ◽  
Indoor Temperature ◽  
Ordinary Concrete ◽  
Fire Characteristics ◽  
Better Than

Compared with ordinary concrete composite floor, profiled sheet-ceramsite concrete composite floor(PSCCF) has the advantages of lighter weight and higher strength, and its resistant fire characteristics is better than ordinary concrete composite floor for stability of characteristics of ceramsite under high temperature. For study of the characteristics of the floor after fire, the experimental research on bearing capacity of the profiled sheet-ceramsite concrete composite floor after fire and the floor not subjected to fire load are further carried out at indoor temperature here. Based on the experimental results, effect of the fire on post-fire bearing capacity of the profiled sheet-ceramsite concrete composite floor is discussed, and the failure phenomenon and mechanism are analyzed. It is shown that he failure form of the profiled sheet-ceramsite concrete composite floor after fire has great change compared with the floor not subjected to fire load, but the bearing capacity of it is still higher.

Estimation of Tensile Strength of High Strength Concrete Based on Experimental Results

2019 ◽  
Vol 292 ◽  
pp. 56-62
Author(s):  
Radmila Sinđić Grebović ◽  
Marko Grebović
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Experimental Research ◽  
High Strength Concrete ◽  
High Strength ◽  
Experimental Results ◽  
Strength Analysis ◽  
Shear Stresses ◽  
Strength Concrete ◽  
Normal Strength

Use of high strength concrete require reliable predictions of correlations of compressive strength with tensile strength or splitting strength. Analysis of correlation between tensile strength of concrete and compressive strength, based on experimental results, is shown in this paper. It is proposed new simple correlation. Regression analysis that use, is based on the results of the experimental researches of compressive strength and splitting tensile strength, at specimens of high strength concrete. Comparative analysis of test results, gained for high strength concrete and normal strength concrete is performed. Analysis comprises the results of the experimental research of deep beams subjected to shear. Stresses measured on surfaces of high strength concrete beams subjected to shear and level of stresses that induce inclined cracks in concrete are applied. Relationship between concrete compressive strength and shear cracking stresses is studied, too. Experimental research was done at pairs of the beams made of concrete with high compressive strength and normal compressive strength. Estimation of validation of relations prescribed by the design codes for high strength concrete has performed.

Experimental Research on the Properties of Modified MPC

2012 ◽  
Vol 450-451 ◽  
pp. 796-799 ◽  
Author(s):  
Bing Chen ◽  
Xin Yuan Yang ◽  
Ning Liu
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Silica Fume ◽  
Experimental Research ◽  
Water Resistance ◽  
Setting Time ◽  
Experimental Results ◽  
Magnesium Phosphate

Magnesium phosphate cement (MPC) was modified by fly ash, silica fume and re-dispersible latex powder and the properties of modified MPC, such as fluidity, setting time and compressive strength, were tested. Based on the experimental results, the contents of 50% fly ash, 10% silica fume and 2% re-dispersible latex powder were chosen to modify MPC and the water resistance of the modified MPC was studied. The experimental results showed that the addition of fly ash prolonged the setting time and significantly increased the compressive strength of MPC. The addition of silica fume improved only the water resistance of MPC. The addition of the re-dispersible latex powder prolonged the setting time and improved the water resistance of MPC.

Study of Post-Fire Behavior of a Profiled Sheet-Ceramsite Concrete Composite Floor

2011 ◽  
Vol 117-119 ◽  
pp. 1857-1860
Author(s):  
Xin Tang Wang ◽  
Ming Zhou ◽  
Ping Xin Sun
Keyword(s):  
Bearing Capacity ◽  
Experimental Research ◽  
Fire Behavior ◽  
Experimental Results ◽  
Dead Load ◽  
Fire Load ◽  
Distributed Load ◽  
Obvious Change ◽  
Bending Capacity

To study the post-fire behavior of the profiled sheet-ceramsite concrete composite floor after exposure to fire load, experimental research on post-fire bearing capacity of a profiled sheet-ceramsite concrete composite floor subjected to dead load, which has shearing nails, is carried out here. Based on the experimental results, the post-fire bearing capacity of the composite floor after exposure to fire is analyzed. It is shown that the failure form of the profiled sheet-ceramsite concrete composite floor after exposure to fire has obvious change compared with the floor not subjected to fire load, but the composite floor subjected to fire load exhibits higher bending capacity, and the ultimate value of the equivalent distributed load is up to 30.86 kN/m2, which may be used as basis of strengthening and repairing of the profiled sheet-ceramsite concrete composite floor after exposure to fire.

scholarly journals Experimental research of steel-concrete load bearing components of bridge column piers

2018 ◽  
Vol 234 ◽  
pp. 04003
Author(s):  
Nataliia Smirnova ◽  
Sergiy Bugayevskiy ◽  
Andrii Ihnatenko ◽  
Olena Synkovska ◽  
Maksym Kovalov
Keyword(s):  
Bearing Capacity ◽  
Axial Compression ◽  
Experimental Research ◽  
Research Data ◽  
Experimental Results ◽  
Transport Infrastructure ◽  
Load Bearing ◽  
Steel Mesh ◽  
Bridge Column ◽  
Cylindrical Steel

A new constructive design of a bridge column pier, which is a load-bearing component of bridges and overpasses as well as of complex multilevel interchanges underlying a transport infrastructure, is proposed. The design is based on a steel mesh casing that is made from a solid-web plate by means of cutting meshes and further expansion of the solid-web plate using non-waste technology. Experimental research data on the bearing capacity and deformability of the cylindrical steel-concrete load bearing components of bridge column piers are provided. They are compared with research data on load bearing components having a solid casing. To make the experimental picture complete, analogous research data on cylindrical concrete load bearing components are provided. This experiment includes static and low-cycle loadings of samples under axial compression mentioned above. On the basis of the information obtained, the effort and travel fields are formed, the critical forces of structure buckling are determined. The analysis of the rationality of the cylindrical steel-concrete load bearing component of bridge column piers is carried out, using the experimental research data. To verify the research data, which are obtained in the course of the study of the critical forces of cylindrical steel-concrete load bearing component buckling, the experimental results are compared with theoretical ones.

scholarly journals Mechanical Properties of the Vertical Joints of Prefabricated Underground Silo Steel Plate Concrete Wall

2020 ◽  
Vol 2020 ◽  
pp. 1-18
Author(s):  
Jun Chuai ◽  
Zhilong Hou ◽  
Zhenqing Wang ◽  
Lumin Wang
Keyword(s):  
Mechanical Properties ◽  
Bearing Capacity ◽  
Steel Plate ◽  
Experimental Results ◽  
Design Calculation ◽  
Compressive Properties ◽  
Concrete Wall ◽  
Joint Connection ◽  
Composite Wall ◽  
Elastic Stage

Reliable joint connection is key to designing prefabricated structures. To study the mechanical properties of the vertical joints in the designed prefabricated underground silo steel plate concrete composite wall and verify their reliability, flexural and compressive experiments were conducted using two groups of six full-scale steel plate concrete composite wall specimens; the mechanical properties between jointed and jointless specimens were compared and analyzed. The experimental results indicate that all specimens are in the elastic stage during the entire loading process; further, they exhibit large stiffness and high bearing capacity without damages. Thus, the designed vertical joints of the steel plate concrete composite wall provide a reliable connection that is safe and applicable. Further, the flexural and compressive properties of jointed and jointless specimens were found to be similar; the newly designed prefabricated underground silo steel plate concrete composite wall could be designed using the “equivalent principle” that the combined wall design calculation with the joint could be equivalent to that without the joint.

scholarly journals Experimental Research on Reinforced Concrete Columns Strengthened with Steel Jacket and Concrete Infill

2021 ◽  
Vol 11 (9) ◽  
pp. 4043
Author(s):  
Aleksandar Landović ◽  
Miroslav Bešević
Keyword(s):  
Compressive Strength ◽  
Reinforced Concrete ◽  
Cross Section ◽  
Experimental Research ◽  
Failure Modes ◽  
Steel Tube ◽  
Rc Columns ◽  
Rc Column ◽  
Steel Jacket ◽  
Ductile Behavior

Experimental research on axially compressed columns made from reinforced concrete (RC) and RC columns strengthened with a steel jacket and additional fill concrete is presented in this paper. A premade squared cross-section RC column was placed inside a steel tube, and then the space between the column and the tube was filled with additional concrete. A total of fourteen stub axially compressed columns, including nine strengthened specimens and five plain reinforced concrete specimens, were experimentally tested. The main parameter that was varied in the experiment was the compressive strength of the filler concrete. Three different concrete compression strength classes were used. Test results showed that all three cross-section parts (the core column, the fill, and the steel jacket) worked together in the force-carrying process through all load levels, even if only the basic RC column was loaded. The strengthened columns exhibited pronounced ductile behavior compared to the plain RC columns. The influence of the test parameters on the axial compressive strength was investigated. In addition, the specimen failure modes, strain development, and load vs. deformation relations were registered. The applicability of three different design codes to predict the axial bearing capacity of the strengthened columns was also investigated.

scholarly journals Analysis of the Influencing Factors of FDM-Supported Positions for the Compressive Strength of Printing Components

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4008
Author(s):  
Zhengkai Feng ◽  
Heng Wang ◽  
Chuanjiang Wang ◽  
Xiujuan Sun ◽  
Shuai Zhang
Keyword(s):  
Compressive Strength ◽  
Stress Intensity ◽  
Influencing Factors ◽  
Fused Deposition Modeling ◽  
Experimental Results ◽  
Compression Tests ◽  
Suspended State ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
Reference Experiment

Fused deposition modeling (FDM) has the advantage of being able to process complex workpieces with relatively simple operations. However, when processing complex components in a suspended state, it is necessary to add support parts to be processed and formed, which indicates an excessive dependence on support. The stress intensity of the supported positions of the printing components can be modified by changing the supporting model of the parts, their density, and their distance in relation to the Z direction in the FDM printing settings. The focus of the present work was to study the influences of these three modified factors on the stress intensity of the supporting position of the printing components. In this study, 99 sets of compression tests were carried out using a position of an FDM-supported part, and the experimental results were observed and analyzed with a 3D topographic imager. A reference experiment on the anti-pressure abilities of the printing components without support was also conducted. The experimental results clarify how the above factors can affect the anti-pressure abilities of the supporting positions of the printing components. According to the results, when the supporting density is 30% and the supporting distance in the Z direction is Z = 0.14, the compressive strength of the printing component is lowest. When the supporting density of the printing component is ≤30% and the supporting distance in the Z direction is Z ≥ 0.10, the compressive strength of printing without support is greater than that of the linear support model. Under the same conditions, the grid-support method offers the highest compressive strength.

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