CONTACT US

Our Address

Science Avenue, High-tech Zone, Zhengzhou City, Henan Province, China

  • Effect of nano metakaolin on compressive strength of ...

    Author: Jun Xie, Heng Zhang, Long Duan, Yongzhu Yang, Jie Yan, Doudou Shan, Xinglong Liu, Jingjing Pang, Yue...
  • Effect of wastes and admixtures on compressive

    2020-7-3  The water-cement ratio of 0.5 (decreased by 10% for samples containing SP) to grading 1: 2: 4 under air-dry condition was adopted in the preparation of concrete specimens. The compressive strength ...

  • Effect of wastes and admixtures on compressive

    Author: Rachit Sharma
  • EFFECT OF RCA ON COMPRESSIVE STRENGTH IN

    2019-6-5  2) The effect of recycled coarse aggregate on the compressive strength of concrete is evident from the results. However the loss in strength was not considerable, but with addition of suitable recycled aggregate and proper method of mix design slight increase in strength can be achieved. 4)The compressive strength of concrete

  • effect of compressive strength in concrete

    The effect of recycled coarse aggregate on concrete compressive strength was investigated based on the concrete skeleton theory. For this purpose, 30 mix proportions of concrete with target cube compressive strength ranging from 20 to 60 MPa were cast with normal coarse aggregate and recycled coarse aggregate from different strength parent ...

  • Compressive Strength of Concrete and Concrete

    2020-5-15  Effect of Duration of Water Curing on Strength of Concrete. There is a significant impact of water curing and time of curing in achieving the strength of the concrete. In addition, curing affects the durability of concrete. The effect of moist curing can be expressed as follows. Allowing concrete to dry out immediately achieve only 40% of the ...

  • Effect of Curing Methods on the Compressive Strength of ...

    2020-7-15  compressive strength of 29.7 N/mm2 while the ones cured by wet rug and polythene sheet have average compressive strength of 26.8 and 24.7 N/mm2 respectively. The traditional curing by immersion appeared to be the best method to achieve desired concrete strength. Key Words: Curing Method, Compressive Strength, Hydration, Mix Ratio 1. INTRODUCTION

  • 11 Factors that can Affect the Strength of Concrete

    2 天前  The strength of the concrete shows the ability of the structure to withstand various loads (i.e. Dead Load, Live Load, Earthquake Load, Wind Load, etc..). The strength of the concrete can be measured with the different test that are conducted on it such as, Compressive strength, Tensile strength and Flexural strength.

  • Effects of Sand Quality on Compressive Strength of ...

    2015-11-5  Failure of concrete structures leading to collapse of buildings has initiated various researches on the quality of construction materials. Collapse of buildings resulting to injuries, loss of lives and investments has been largely attributed to use of poor quality concrete ingredients. Information on the effect of silt and clay content and organic impurities present in building sand being ...

  • Compressive and Tensile Strength of Concrete:

    2 天前  The flexural strength of concrete was found to be 8 to 11% of the compressive strength of concrete of higher strength concrete of the order of 25 MPa (250 kg/cm 2) and 9 to 12.8% for concrete of strength less than 25 MPa (250 kg/cm 2) see Table 13.1: . The ratio of flexural strength to compressive strength was found higher for 40 mm maximum size aggregate than that of 20 mm max sized aggregate.

  • Internal Curing Effect and Compressive Strength ...

    位置: 8600 Rockville Pike, Bethesda, MD
  • Compressive Strength Performance of Reactive

    Reactive Powder Concrete (RPC) can be incorporate as a one of the most important and progressive concrete technology. It is a special type of ultra-high strength concrete (UHSC) that’s exclude the coarse aggregate from its constitutive materials. In this research an experimental study had been carried out to investigate the effect of using three types of materials (porcelain aggregate) and ...

  • EFFECT OF CURING METHODS ON THE COMPRESSIVE

    4.2. Compressive strength Figures 2 and 3 shows a summary of the e ect of curing method on the compressive strength with curing age for all the curing methods used. It could be seen that there was a signi cant increase in concrete strength with age depending on the curing method adopted. Compressive strength when arranged in de-

  • EFFECT OF NANO SILICA ON THE COMPRESSIVE

    2017-1-31  studied the combined effect of micro found that concrete will attain maximum compressive strength when it contains 6% micro silica and 1.5% nano silica. The highest electrical resistivity of concrete was observed at 7.5% micro and nano silica. The capillary absorption rate is lowest for the combination of 3% micro

  • Size and Shape Effects on the Compressive Strength of

    2013-4-18  the size and shape effect on compressive tests per-formed on High-Strength Concrete (HSC) specimens. Specifically, we wanted to disclose the influence of the size in cubes and the relationship between com-pressive strength obtained from standard cylinders, ASTM C39 (100 £200mm) and the strength got from cubes.

  • Effect of Curing Methods on the Compressive Strength of ...

    2020-7-15  that the 28-day compressive strength of concrete cube specimens, continuously moisture cured, had compressive strength 20% higher than those of uncured cubes. It is a known fact that many other factors affect the development of strength of concrete and consequently its durability other than curing or curing technique applied.

  • Effect of aggregate type on Compressive strength of

    2017-12-12  The compressive strength of concrete depends on the water to cement ratio, degree of compaction, ratio of cement to aggregate, bond between mortar and aggregate, and grading, shape, strength and size of the aggregate (Roccoand Elices, 2009; Elices and Rocco, 2008).

  • Effect of Aggregate Flakiness on the Compressive

    2017-12-19  for compressive strength, density and workability. The results expose that the effect of elongated aggregates is more than flaky aggregates, on the characteristic compressive strength of concrete. Concrete with 1:1 ratio of flaky to elongated aggregates has minimum weight. For a

  • Effect of Steel Fibres on Compressive Tensile

    Effect of Steel Fibres on Compressive Tensile Strength of Concrete using M -Sand as Fine Aggregate - written by Shivang. D. Jayswal, Prof. A. G. Hansora, Prof. A. A. Pandya published on 2015/05/11 download full article with reference data and citations

  • Factors Affecting Strength of Concrete - The Constructor

    Factors Affecting Strength of Concrete Concrete strength is affected by many factors, such as quality of raw materials, water/cement ratio, coarse/fine aggregate ratio, age of concrete, compaction of concrete, temperature, relative humidity and curing of concrete. Quality of Raw Materials Cement: Provided the cement conforms with the appropriate standard and it has been stored correctly [hellip;]

  • Effect of Aggregate Flakiness on the Compressive

    2017-12-19  for compressive strength, density and workability. The results expose that the effect of elongated aggregates is more than flaky aggregates, on the characteristic compressive strength of concrete. Concrete with 1:1 ratio of flaky to elongated aggregates has minimum weight. For a

  • Effects of Nanosilica on Compressive Strength and ...

    The effects of the addition of different nanosilica dosages (0.5%, 1%, and 1.5% with respect to cement) on compressive strength and durability properties of concrete with water/binder ratios 0.65, 0.55, and 0.5 were investigated. Water sorptivity, apparent chloride diffusion coefficient, electrical resistivity, and carbonation coefficient of concrete were measured.

  • The effect of temperature on the compressive

    2020-1-22  The crushing strength of concrete at temperatures up to 600°C was independent of the water/cement ratio used but was influenced by the aggregate/cement ratio. Concrete specimens loaded to produce normal design compressive stress during the period of heating showed less reduction in strength than specimens without imposed load.

  • Effect of Direct Compressive Stress on the Shear Transfer ...

    Al-Sulayvani: Effect of Direct Compressive Stress on the Shear Transfer Strength of 67 The study reported in this paper deals with the shear transfer problem across an initially uncracked plane for fibrous concrete by testing push-off and modified push-off specimens to simulate the effect of direct compressive stress on the shear transfer strength.

  • Compressive Strength of Concrete and Concrete

    2020-5-15  Effect of Duration of Water Curing on Strength of Concrete. There is a significant impact of water curing and time of curing in achieving the strength of the concrete. In addition, curing affects the durability of concrete. The effect of moist curing can be expressed as follows. Allowing concrete to dry out immediately achieve only 40% of the ...

  • Effect of Cube Size on the Compressive Strength of

    2017-1-2  Effect of shape of the specimen on the compressive strength of concrete has been widely studied and different relationships have been proposed between the cube compressive strength and cylinder strength. As per Indian Standards 150mm cubes are used for determining the compressive strength of concrete. Use of I00 mm cubes has its advantages.

  • EFFECT OF REBAR ON COMPRESSIVE STRENGTH OF

    2009-11-11  CD06-011 EFFECT OF REBAR ON COMPRESSIVE STRENGTH OF CONCRETE CORES M. Tadayon1, H.T.P Moghadam2, M.H. Tadayon3 1Associate professor, Civil Eng. Dept., Engineering Faculty, Bu-AliSina University, Hamedan, Iran 2Graduate of Iran University of Science and Technology Civil Engineering Faculty, Tehran, Iran 3M.S. Student, Dept of civil Eng., Engineering Faculty,

  • Effect Of Different Curing Methods On The

    Mixture Proportions of Concrete. The normal concrete was prepared based on water cement ratio of 0.50 and a cement content of 340kg/m 3 to obtain a compressive strength greater than 20N/mm 2 at 28 days (Immersion method of curing). Quartzite sand was used with a

  • Factors Affecting Strength of Concrete - The Constructor

    Factors Affecting Strength of Concrete Concrete strength is affected by many factors, such as quality of raw materials, water/cement ratio, coarse/fine aggregate ratio, age of concrete, compaction of concrete, temperature, relative humidity and curing of concrete. Quality of Raw Materials Cement: Provided the cement conforms with the appropriate standard and it has been stored correctly [hellip;]

  • Importance of Water-Cement Ratio in Concrete

    2 天前  The compressive strength of concrete is a major characteristic of the concrete mix. Change in the amount of water changes the strength of concrete. If water is used in more quantity, it may develop more voids and develop honey-combed structure to a large extent in set concrete. It results in decrease in density, durability and strength.

  • Effect of Direct Compressive Stress on the Shear Transfer ...

    Al-Sulayvani: Effect of Direct Compressive Stress on the Shear Transfer Strength of 67 The study reported in this paper deals with the shear transfer problem across an initially uncracked plane for fibrous concrete by testing push-off and modified push-off specimens to simulate the effect of direct compressive stress on the shear transfer strength.

  • Effect of Locust Bean Pod Epicarp Ash (Lbpea) on the ...

    2020-8-3  Effect of Locust Bean Pod Epicarp Ash (Lbpea) on the Compressive Strength of Revibrated Concrete СУЗИС Строительство уникальных зданий и сооружений Санкт-Петербургский политехнический университет Петра Великого, Санкт ...

  • The effect of temperature on the compressive

    2020-1-22  The crushing strength of concrete at temperatures up to 600°C was independent of the water/cement ratio used but was influenced by the aggregate/cement ratio. Concrete specimens loaded to produce normal design compressive stress during the period of heating showed less reduction in strength than specimens without imposed load.

  • Compressive Strength of Concrete due to Moisture

    The effect of types and moisture conditions of aggregates according to the change of water/binder ratio was similar. However, the curing conditions had a significant effect on the compressive strength of the concrete with the different types of aggregates.

  • Effect of Curing Temperature Histories on the

    Concrete produced using the type I mixture achieved the design strength of 42 MPa at the age of 28 days regardless of curing history, whereas the 28-day compressive strength of concrete of the type II mixture, except for concrete cured under the hot temperature condition, was slightly lower than the design strength of 65 MPa, as listed in Table 3.

  • Effect of Cylinder Size on the Compressive Strength of ...

    2018-7-23  Abstract. This study was conducted to assess the effect of cylinder size on concrete compressive strength by CO 2 curing. The factors studied to evaluate the effect of cylinder size on concrete compressive strength were cylinder size, CO 2 concentration, curing pressure, curing time, and age of specimen at testing. Three different cylinder sizes (5 × 10 cm, 10 × 20 cm, 15 × 30 cm), three

  • Effect Of Different Curing Methods On The

    Mixture Proportions of Concrete. The normal concrete was prepared based on water cement ratio of 0.50 and a cement content of 340kg/m 3 to obtain a compressive strength greater than 20N/mm 2 at 28 days (Immersion method of curing). Quartzite sand was used with a

  • The Effect of Aggregate Properties on Concrete

    2000-3-30  The Effect of Aggregate Properties on Concrete Concrete is a mixture of cementious material, aggregate, and water. Aggregate is commonly considered inert filler, which accounts for 60 to 80 percent of the volume and 70 to 85 percent of the weight of concrete. ... The compressive aggregate strength is an important factor in the selection of ...

  • Compressive Strength of Concrete Concrete Cubes

    Compressive strength as per American Codes. In case of American codes, compression strength is defined in terms of cylinder strength fc’. Here compressive strength of concrete at 28 days curing is obtained from a standard cylindrical specimen 150mm diameter and 300mm high loaded longitudinally to failure under uniaxial compression loading.

  • Importance of Water-Cement Ratio in Concrete

    2 天前  The compressive strength of concrete is a major characteristic of the concrete mix. Change in the amount of water changes the strength of concrete. If water is used in more quantity, it may develop more voids and develop honey-combed structure to a large extent in set concrete. It results in decrease in density, durability and strength.