Core Sampling and Testing of Concrete and Factors ...

Following are the factors which affect the compressive strength of extracted concrete cores: Size of stone aggregate If the ratio of diameter of core to maximum size of stone aggregate is less than 3, a reduction in strength is reported. For concrete with 20mm size aggregate, 50mm dia core has been tested to give 10% lower results than with ...

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Design Anomalies in Concrete Deck-Steel Stringer Bridges

The objective of this paper is to review the factors that influence the deterioration of concrete deck-steel stringer bridges, which have not received adequate attention in the current AASHTO highway bridge design specifications, and to investigate the accuracy of …

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The effect of temperature on the compressive strength of ...

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.

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BOND STRENGTH OF PCM-CONCRETE INTERFACES: …

strength increased with substrate concrete strength only when the failure occurs at the concrete cohesion layer and the roughness had more pronounced effect on the bond strength when compressive strength of PCM is equal or lower than that of substrate concrete. Keywords: bond strength, interface, roughness, adhesion layer, cohesion layer 1.

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(PDF) Influence of the Crushing Process of Recycled ...

So the influence of the crushing process on the performance . ... i.e. the factors that affect the overall def ... Concrete specimens were prepared with a recycled normal-strength concrete (NC ...

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WHAT ARE THE FACTORS INFLUENCING COMPRESSIVE STRENGTH TEST ...

Factors Affecting Strength Test Results of Concrete Compressive strength is the most important property of concrete. The compressive strength of concrete is determined in the laboratory in controlled conditions. On the basis of this test result we judge the quality of concrete. But sometimes the strength test results vary so widely that it becomes difficult […]

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Factors affecting durability of concrete • Aggregate ...

Strength of concrete has a considerable influence on creep and within a wide range creep is inversely proportional to the strength of concrete at the time of application of load. From this it follows that creep is closely related to the water-cement ratio.

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Key Factors Affecting Strength of Concrete - Structural Guide

The factors affecting the strength of concrete are must known to develop the required strength. There are key factors as discussed in the article Compressive Strength of Concrete and Testing of Concrete that affect the strength of the concrete…

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HOW AGGREGATE PROPERTIES AFFECTS CONCRETE ... - …

INFLUENCE OF AGGREGATE PROPERTIES ON CONCRETE. Aggregates influence the properties of concrete/mortar such as water requirement, cohesiveness and workability of the concrete in plastic stage, while they influence strength, density, durability, permeability, surface finish and colour in hardened stage.

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Factors Affecting Strength of Concrete - The Constructor

Key Factors Affecting Strength of Concrete - Structural Guide

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A study of factors affecting the flexural tensile strength ...

Many factors have been shown to influence the flexural tensile strength of concrete, particularly the level of stress, size, age and confinement to concrete flexure member, etc. The concrete members, in general, are of large continuous size and have at least minimum reinforcement introducing a confining effect to the concrete.

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EFFECTS OF AGGREGATE TYPE, SIZE, AND CONTENT ON …

coarse aggregate contents with aggregate volume factors (ACI 211.1-91) of0.75 and 0.67. Water-to-cementitious material ratios range from 0.24 to 0.50. ... High-strength concrete containing basalt and normal-strength concrete ... size is not expected to influence the fracture . 2 parameters. Tests by Zhou, Barr, and Lydon (1995) show that ...

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Effect of Aggregates on the Properties of Concrete ...

The shape and texture of aggregate influence the concrete strength considerably. The flexure strength is more affected than the compressive strength. These factors are more significant in the case of high strength concrete. Surface texture affects compressive strength by 44% and flexure strength by 26%.

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Factors Affecting Bond Strength of Overlay Concrete on ...

Following are the different factors which affect bond strength of overlay concrete on bridge decks: Condition of deck concrete. Extent of the damage because of the removal of loose concrete. Concrete surface preparation for the placement of overlay concrete. The placement and compaction of overlay concrete. Curing of placed overlay concrete.

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Experimental Study on Performance Influencing Factors and ...

The utilization of desert sand for making ceramsite lightweight aggregate concrete is proposed to make full use of local natural resources in the development of a new type of lightweight and load-bearing wall material with good energy conservation, waste utilization, and thermal insulation performances. An orthogonal test was conducted to analyze the effects of the water-binder ratio, sand ...

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A Study OF Factors Affecting The Flexural Tensile Strength ...

Many factors have been shown to influence the flexural tensile strength of concrete, particularly the level of stress, size, age and confinement to concrete flexure member etc. The concrete ...

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