what is compressive strength of 1 2 4 concrete after

Designing and Proportioning Normal Concrete Mixtures, Chapter 9

9-2. Approximate relationship between compressive strength and water to cementing materials ratio for concrete using 19-mm to 25-mm (3⁄4-in. to 1-in.) nominal ..... The slump values for concrete containing aggregates larger than 11⁄2 in. are based on slump tests made after removal of particles larger than. 11⁄2 in. by wet...

Get Quote

How to Calculate Quantities of Cement, Sand and Aggregate for ...

Feb 7, 2017 ... Mix design is a process of determining the right quality materials and their relative proportions to prepare concrete of desired properties like workability, strength, setting time and durability. While following a mix design is advised to optimise the material consumption, it is not possible at site to always come...

Get Quote

Assessment of Compressive Strength of Concrete Based On ...

strength varies from 36 to 36.34 MPa for aggregate combination C at mix ratios 1, 2, 3 after 28 days curing period but only in mix ratio 4 the maximum strength obtained 45.17 MPa for Combination A. Keywords: Aggregate, Concrete, Compressive Strength and Mix Ratio. Introduction: Concrete is unique and extensively...

Get Quote

EFFECTS OF AGGREGATE TYPE, SIZE, AND CONTENT ON ...

The compressive strength of high-strength concrete containing lizenithne is not affected by aggregate content. Flexure test results show that high-strength concrete ..... Fracture specimen load-deflection curves for 12 mm (1/2 in.) and 19 ..... compressive strengths due to aggregate size is increasingly larger with a decreasing.

Get Quote

Compressive Strength of Concrete Using Recycled Concrete ...

ABSTRACT. This paper presents a report of an experimental investigation on the effect of complete replacement of natural aggregate by recycled concrete aggregate in the production of concrete on the compressive strength of concrete. Two sets of concrete mixtures of ratios 1:3:6, 1:2:4, 1:11/2:3, 1:1:2 by mass were cast...

Get Quote

Grades of Concrete with Proportion (Mix Ratio) - Civilology

Group, Concrete Grade, Mix Ratio, Characteristic Compressive Strength (N/mm2). Ordinary Concrete, M5, 1 : 5 : 10, 5 N/mm2. M7.5, 1 : 4 : 8, 7.5 N/mm2. M10, 1 : 3 : 6, 10 N/mm2. M15, 1 : 2 : 4, 15 N/mm2. M20, 1 : 1.5 : 3, 20 N/mm2. Standard Concrete, M25, 1 : 1 : 2, 25 N/mm2. M30, Design Mix, 30 N/mm2. M35, Design Mix...

Get Quote

What is the acceptance limit of concrete''s strength in 28 days ...

Technically on 28th day the strength should be of concrete, but sometimes strength is not achieved due to improper curing or bleeding of ... M5 (1:5:10) = 5 N/mm^2; M7.5 (1:4:8) = 7.5 N/mm^2; M10 (1:3:6) = 10 N/mm^2; M15 (1:2:4) = 15 N/mm^2; M20 (1:1.5:3) = 20 N/mm^2; M25 (1:1:2) = 25 N/mm^2.

Get Quote

Compressive Strength of Concrete Cubes - Lab Test & Procedure

After some time the mould should be covered with red gunny bag and put undisturbed for 24 hours at a temperature of 27 ° celsius ± 2. After 24 hours remove the specimen from the mould. Keep the specimen submerged under fresh water at 27 ° celsius. The specimen should be kept for 7 or 28 days. Every 7 days the water...

Get Quote

Compressive strength prediction of Portland cement concrete with ...

It is well known that, immediately after mixing cement based materials, the hydration process takes place. ... British code gives modification factors for permissible compressive strength as 1.0, 1.10, 1.16, 1.2 and 1.24 for 1, 2, 3, 6, and 12 months as minimum age of member when full design load is applied whereas, for high...

Get Quote

Compressive Strength of Concrete -Cube Test, Procedure, Results

Apr 2, 2014 ... American Society for Testing Materials ASTM C39/C39M provides Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens. Table of Contents [show]. 1 ... These specimens are tested by compression testing machine after 7 days curing or 28 days curing. Load should be applied...

Get Quote