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IMPROVING THE COMPRESSIVE STRENGTH OF CONCRETE BY

compressive strength development of plain concrete. They observed that those immersed in lime had the highest compressive strength compared to those covered with wet rug and air drying. This study investigated the potential improvement of compressive strength of concrete by curing in a water tank with various proportions of

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Improving compressive strength of concrete by a two-step ...

01-04-1996  Vol. 26, No. 4 STRENGTH, TWO-STEP MIXING, SUPERPLASTICIZERS 589 TABLE 5 Properties of Concrete Mixed by Two-Step Mixing Method (Using an Ultramixer and a Normal mixer) Mixing method Water-Cement ratio Slump (cm) Compressive strength (MPa) Standard deviation Variation coefficient (%) Pre-mixing of cement paste 0.40 4.5 50.97 2.52 4.94 0.45 18.5 46.22 1.55

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Improving compressive strength of concrete by a two-step ...

The properties of the two-step mixed concrete and conventional concrete are compared. At 28-day age, concrete mixed by the two-step mixing method showed about 8 to 17% higher compressive strength than the concrete mixed by the normal method, depending upon the water — cement ratio, the mixing process and the type of mixer.

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Improving the compressive strength of concrete by curing ...

Improving the compressive strength of concrete by curing in water/lime solution . 5 2 1 2 1

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Improving compressive strength of concrete by a two-step ...

The properties of the two-step mixed concrete and conventional concrete are compared. At 28-day age, concrete mixed by the two-step mixing method showed about 8 to 17% higher compressive strength than the concrete mixed by the normal method, depending upon the water — cement ratio, the mixing process and the type of mixer.

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Improving the compressive strength of concrete by curing ...

Improving the compressive strength of concrete by curing in water/lime solution . 5 2 1 2 1

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Improving the Compressive Strength of Reclaimed Asphalt ...

27-03-2019  Adding SF modifies the characteristics and the behavior of fresh concretes (Mazloom et al. 2004) and hardened concretes (Wong and Razak 2005); SF improves the adhesion between concrete constituents, thanks to its pozzolanic properties, leading to a significant increase in compressive strength between 7 and 91 days (Wong and Razak 2005).

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3 Curing Techniques to Improve the Compressive Strength of ...

07-05-2021  Curing for Compressive Strength of Concrete. Freshly mixed concrete normally contains more water than is required for hydration of the cement; however, excessive loss of water by evaporation can delay or prevent adequate hydration, especially in the surface of the slab.

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Improvement In The Strength Of Concrete By Using ...

D.concrete TABLE 4: PROPERTIES OF FRESH CONCRETE 4. Tests on hardened concrete 4.1 compressive strength test: Three specimens for each are cast with different percentages of RHA with gradual Increase of 2.5% from 0%-20% by replacing the cement by weight. Table3 shows that the strength of RHA concrete initially does

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[PDF] STUDY THE COMPRESSIVE STRENGTH OF CONCRETE BY ...

Compressive strength of concrete with different amount of glass powder and bagasse was studied as partial replacement of cement. From the experimental investigations, it has been absorbed that, the optimum replacement of glass powder and bagasse to cement without changing much compressive strength is 10%.

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IMPROVEMENT OF THE COMPRESSIVE STRENGTH AND WATER ...

(i) Compressive strength The compressive strength of the concrete cubes was determined according to BS EN 12390-3 (2002). Cube sized 100 mm x 100 mm x 100 mm was used as specimen testing. The cube specimens were tested at 7 and 28 days. (ii) Water absorption Water absorption test is a method of determining the rate of absorption of water by ...

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Compressive Strength of Concrete by Using Coconut Shell

Compressive Strength of Concrete by Using Coconut Shell International organization of Scientific Research 5 P a g e Graph 2: Comparison of Compressive strength analysis of CS concrete at 28 Days 1. From Graph 2, for M20 grade concrete cubes with 30% replacement of CS aggregates had given requisite strength of 23 Mpa at 28 days.

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Can we increase the concrete compressive strength with ...

18-10-2013  To increasing the compressive strength of concrete, we must increase cement and decrease water quantity. For example, M15 grade of concrete when we use50 kg of cement,480 kg aggregates and32 liters water we get15N/sq.mm compressive strength after28 days

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What are some ways to increase the strength of a concrete ...

Factors affecting concrete strength There are many relevant factors; some of the more important follow: Concrete porosity: voids in concrete can be filled with air or with water. Air voids are an obvious and easily-visible example of pores in conc...

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Improving compressive strength of concrete by a two-step ...

The properties of the two-step mixed concrete and conventional concrete are compared. At 28-day age, concrete mixed by the two-step mixing method showed about 8 to 17% higher compressive strength than the concrete mixed by the normal method, depending upon the water — cement ratio, the mixing process and the type of mixer.

Get Price

Improving the Compressive Strength of Reclaimed Asphalt ...

27-03-2019  Adding SF modifies the characteristics and the behavior of fresh concretes (Mazloom et al. 2004) and hardened concretes (Wong and Razak 2005); SF improves the adhesion between concrete constituents, thanks to its pozzolanic properties, leading to a significant increase in compressive strength between 7 and 91 days (Wong and Razak 2005).

Get Price

Increasing Concrete Strength - North America

The compressive strength of concrete can be increased by: Including admixtures. Adjusting the cement type and quantity. Reducing the water/cement ratio. Utilizing supplementary cementitious materials (SCMs) Altering the aggregates - type and gradations. Additionally, high-early strength concrete can be achieved through a 4x4 Concrete System.

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Improvement The Compressive Strength and Flexural Strength ...

01-05-2019  This research aims to improve compressive strength and flexural concrete by adding fiber with variations of 0%, 1%, 3%, 5%, and 7% on the weight of cement on the concrete quality of K-225. The concrete design uses the Department of Environment (DOE) method, with cylinder molds with a size of 150 mm x 300 mm.

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IMPROVEMENT OF THE COMPRESSIVE STRENGTH AND WATER ...

(i) Compressive strength The compressive strength of the concrete cubes was determined according to BS EN 12390-3 (2002). Cube sized 100 mm x 100 mm x 100 mm was used as specimen testing. The cube specimens were tested at 7 and 28 days. (ii) Water absorption Water absorption test is a method of determining the rate of absorption of water by ...

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The Use of Rice Husk Improving the Final Setting Time and ...

23-05-2015  The Use of Rice Husk Improving the Final Setting Time and Compressive Strength of Concrete - written by Namrata Verma, Abhishek Kumar, Megha Ramteke published on 2015/05/23 download full article with reference data and citations

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Compressive Strength of Concrete Definition, Importance ...

29-01-2017  Strength of hardened concrete measured by the compression test. The compression strength of concrete is a measure of the concrete's ability to resist loads which tend to compress it. The compressive strength is measured by crushing cylindrical concrete specimens in compression testing machine. The compressive strength of concrete is calculated by the failure load

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What are some ways to increase the strength of a concrete ...

Factors affecting concrete strength There are many relevant factors; some of the more important follow: Concrete porosity: voids in concrete can be filled with air or with water. Air voids are an obvious and easily-visible example of pores in conc...

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Compressive Strength of Concrete -Cube Test, Procedure ...

Concrete compressive strength for general construction varies from 15 MPa (2200 psi) to 30 MPa (4400 psi) and higher in commercial and industrial structures. Compressive strength of concrete depends on many factors such as water-cement ratio, cement strength, quality of concrete material, quality control during the production of concrete, etc.

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(PDF) Bacterial concrete: Development of concrete to ...

The objective of the present investigation is to study the potential application of bacteria, Bacillus sphaericus to improve the compressive and split-tensile strength of cement concrete after ...

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