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### Study on the effect of Compressive Strength of ...

The strength of ordinary plain cement mortar cube ( without mild steel fibre) was found to be 1.52 N/mm 2for 1:4 ratio cement mortar, 2.201 N/mm for 1:6 ratio cement mortar, and 2.201 N/mm2for 1:8 ratio cement mortar. Effect of use of water proof chemical in cement mortar.

Get Price### STUDIES ON STRENGTH CHARACTERISTICS OF CONCRETE .

1. To prepare the concrete specimens such as cubes for compressive strength, cylinders for split tensile test, prisms for flexural strength and also cubes for durability studies in laboratory with 0%, 10%, 20% and 30% replacement of metakaolin with OPC for M20 and M40 grade concrete. 2.

### Civil Engineering - Concrete Technology - Discussion

This is the civil engineering questions and answers with discussion section on "Concrete Technology" with explanation for various interview, competitive examination and entrance test. Solved examples with detailed answer description, explanation are given and it would be easy to understand - Discussion .

Get Price### Effects of Water-Cement Ratios on the Compressive .

Effects of Water-Cement Ratios on the Compressive Strength and Workability of Concrete and Lateritic Concrete Mixes. ... strength of concrete is affected partly by the ... switched on vibrated the cubes, making the concrete to lose the trapped air in the mix. This was

Get Price### DETERMINATION OF COMPRESSIVE STRENGTH .

DETERMINATION OF COMPRESSIVE STRENGTH STANDARD IS 4031 (Part 6) 1988. DEFINITION Compressive strength is defined as the ratio of the load per unit area. APPARATUS Vibrating machine confirming to IS: 10080 – 1982. Poking rod confirming to IS: . Cube moulds shall be of 70.60mm size confirming to IS: .

Get Price### Development of High Performance Concrete and Evaluation .

The concrete had components of no mineral admixtures, silica fume only, or both fly ash and silica fume in addition to the ordinary Portland cement. The creep strain was measured under about 39% of f'' c (at 28 days) for a test duration of 430 days, and then unloaded so that creep recovery was measured.

Get Price### COMPRESSIVE STRENGTH OF SELF COMPACTING .

concrete are moreover expressed as a function of this parameter. In Eurocodes 2 concrete is classifield only on the basis of cube (f c,cub) and cylinder strength (f c,cyl). Fig. 4 – Testing cube and cylinder speciments. The compressive strength of concrete is affected by many factors, most

Get Price### Maximum Compressive Strength| Concrete Construction ...

Maximum Compressive Strength. In normal concrete work, the maximum compressive strength that can possibly be obtained is generally reckoned to be about 7,500 psi for a 28-day cylinder. It would be interesting to know if there is a conceivable maximum limit .

Get Price### COMPRESSIVE STRENGTH AND WORKABILITY OF .

As was the case for concrete with a w/b ratio of 0.5, the mix composition 50:50 recorded the highest strength at 7, 28 and 90 days of curing although its 90- days strength is not significantly higher than the strength of the 30:70 and 60:40 mixes.

Get Price### Effect of Calcium Chloride on the Compressive Strength of ...

Mar 03, 2015· Cubes produced from the concrete were cured for 7, 14, 21 and 28 days respectively. The mean densities of the concrete cubes made from the three brands of cement with and without admixture were computed. The corresponding mean compressive strength for the concrete cubes .

Get Price### Strength to Weight Ratio of Lightweight Concrete

As a result, the data shows that the strength to weight ratio of normal concrete is greater than the strength to weight ratio of concrete containing perlite. An experiment was done at an earlier date where the average specific strength was 81,336 with a w/c of 0.40. The normal concrete only contained cement type II, Ottawa sand, and water.

Get Price### Effect of Specimen Size on Compressive, Modulus of Rupture ...

RESULTS AND DISCUSSION. It is worth to mention that the width of the indenter that is used for testing the splitting strength of each cube size is equal to 10% of the cube side, while for cylinder splitting test the ASTM C 496 (1996) are applied.

Get Price### CHAPTER 6 RESULTS AND DISCUSSIONS - Shodhganga

6.2.1.3 Compressive strength test on concrete cubes The effect of copper slag substitution as a fine aggregate on the strength of concrete is given in Table 6.2, which presents the average 7 and 28 day cube compressive strength of concrete. A total number of 42 mortar specimens were cast and tested shown in Figure 6.1. The unconfined

Get Price### What is Concrete Strength and what are the factors ...

strength of cement v/s strength of concrete It is not possible to design a concrete mix of high strength with cement of low strength. The variation in strength of cement is due largely to the lack of uniformity in the raw materials used in its manufacture, not only between .

### 7 Days Compressive Strength of Concrete - Concrete ...

Apr 22, 2005· Mass traps heat and heat cures concrete, hence strength develops much quicker in a massive concrete beam than it might in a 6" cube or cylinder. An excellent tool to estimate insitu strength of concrete is the ASTM C1074 Maturity Meter.

Get Price### Experimental investigations on Elastic Properties of ...

Experimental investigations on Elastic Properties of Concrete containing Steel fibre . K.Anbuvelan #1, Dr.K.Subramanian ... concrete and cube compressive strength of concrete as, ... V. RESULTS AND DISCUSSION –STATIC MODULUS OF ELASTICITY .

Get Price### Strength of Concrete vs Grades of Cement

The fact, that it is not possible to design a concrete mix of high strength with cements of low strength, there is a tendency among the manufacturers of Portland Pozzolana cements to produce high strength PPCs with the labels such as IS: 1489 (Part I), 43- MPa & IS: 1489 (Part I), 53- .

Get Price### 3 Day Prediction - Concrete Compressive Strength ...

Sep 01, 2011· For normal weight concrete, using conventional Type I portland cement (again, a US designation since I don''t know where you are located) and no admixtures that would change the properties of the hardened concrete, you can expect to obtain about 40 to 50 percent of the 28-day strength in 3 days, and about 65 to 70 percent of the 28-day strength ...

Get Price### Standard Test Method for Compressive Strength of ...

5.1 Care must be exercised in the interpretation of the significance of compressive strength determinations by this test method since strength is not a fundamental or intrinsic property of concrete made from given materials. Values obtained will depend on the size and shape of the specimen, batching, mixing procedures, the methods of sampling, molding, and fabrication and the age, .

Get Price### Utilisation of Recycled Aggregate as Coarse Aggregate in ...

Many local concrete producers use 150 x 150 cubes for compressive strength test. To pour 1000 m 3 concrete, an average of 2 m to 4 m3 from it will be used for concrete cube tests. These tested cubes can be crushed and screened through portable, mobile or stationary recycle plants instead of being

Get Price### Civil Engineering - UPSC Civil Service Exam Questions ...

This is the civil engineering questions and answers with discussion section on "UPSC Civil Service Exam Questions" with explanation for various interview, competitive examination and entrance test. Solved examples with detailed answer description, explanation are given and it would be easy to understand - Discussion page for Q.6382.

Get Price### CONCRETE COMPRESSIVE STRENGTH TEST REPORT

Strength Compressive Fracture No. ID Specimen (in) (sq in) Received Tested (days) (lbs) (psi) Type 1 A 6.00 28.27 02/19/13 28 157,640 5,580 3 Comments: Not tested for plastic unit weight. Services: Perform compressive strength determinations of test cylinders cast by others and delivered to the laboratory. Reported To: Contractor: Report ...

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