Chapter 4: mix design calculation sheet for 40 N/mm2 ...

Estimated compressive strength (f cu) = 49 N/mm2 (Table 2) Target mean strength (f m) = 253 N/mm w/c 0.46 (Graph 4) w/c NS (Use the lower value as w/c) w/c = 0.46 7-Free-water content (W) Use Table 3 Slump 60-180 mm Maximum aggregate size 20 mm

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

By this single test one judge that whether Concreting has been done properly or not. 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 ...

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Effects of Water-Cement Ratio and Maximum Size of Coarse ...

Compressive strength at 28 days 36.5 MPa Gas burnt first class bricks manufactured by a local company were collected for making coarse aggregate (usually known as khoa). Representative samples of collected bricks were then tested in the laboratory for their crushing strength and the mean compressive strength was found as 47.1 MPa.

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A COMPARATIVE STUDY ON COMPRESSIVE STRENGTH OF …

strength of concrete at both optimum levels, glass as fine aggregate produced much higher compressive strength concrete of 23.65N/mm 2 compared to 20.65N/mm 2 recorded by glass as coarse aggregate. 3.3 Effect of Ageing

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Influence of size of aggregates on the Compressive ...

compressive strength associated with smaller sized aggregates compared to large sized aggregates. The results in Table indicated that the 10 mm 12mm and 15 mm aggregate size. The mean compressive strength for the 15mm was higher (20 mm) than the 10mm (13 mm) coarse aggregates.

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(PDF) Structural concrete made with recycled aggregates ...

This ˛ − ˛0 Rcm = Rcm,max · (10) means that the use of recycled aggregates results in an earlier ini- 1 − ˛0 tial strength gain, a lower maximum potential strength Rc,max and where ˛0 is the "critical" degree of hydration, below which the a lower rate of growth m. evolution of …

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AGGREGATE WITH DIFFERENT SIZES OF COARSE …

Table 1 Results of Compressive strength of aggregates Types of aggregates Compressive strength Quartzite High Gravel Medium Granite Low Jimoh, A.A. and Awe, S.S. [2] found the effect of the aggregate type and its size on the compressive strength of concrete. The sample with a mix proportion of 1:2:4 was cast with

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What is the effect of coarse aggregate size in compressive ...

(2) Compressive strength of a concrete increases with increase in coarse aggregate size. Coarse aggregate size 13.2 mm, 19 mm, 25 mm, and 37.5 mm gave average compressive strength of 21.26 N/mm2, 23.41 N/mm2, 23.66 N/mm2 and 24.31N/mm2 respectively. (3) Flexural strength of concrete beam is inversely affected by the increase in coarse aggregate ...

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Lab Test on Aggregates at Site - CivilJungle

The test sample consists of aggregates sized 10.0 mm 12.5 mm. Aggregates may be dried by heating at 100-110° C for a period of 4 hours and cooled. Sieve the material through 12.5 mm and 10.0mm IS sieves. The aggregates passing through 12.5mm sieve and retained on 10.0mm sieve comprises the test material. What Is the Ideal Grading of Aggregates?

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The Effect of Aggregate Properties on Concrete

Aggregate is classified as two different types, coarse and fine. Coarse aggregate is usually greater than 4.75 mm (retained on a No. 4 sieve), while fine aggregate is less than 4.75 mm (passing the No. 4 sieve). The compressive aggregate strength is an important factor in the selection of aggregate.

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EFFECTS OF AGGREGATE TYPE, SIZE, AND CONTENT ON …

compressive strength of concrete. Ruiz (1966) found that the compressive strength of concrete increases with an increase in coarse aggregate content until a critical volume is reached, while Bayasi and Zhou (1993) found little correlation between compressive strength and coarse aggregate content.

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EFFECT OF COARSE AGGREGATE CHARACTERISTICS ON STRENGTH ...

EXPERIMENT WORK Concrete cubes of 150 X 150 X 150 mm dimension were cast for compressive strength. They were tested for compressive strength after 56 days of water curing. For This, five specimens were tested and the mean value of these measurements is reported. Coarse aggregate contain 10 mm and 20 mm of 40% and 60% Respectively.

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Stone Dust in Concrete: Effect on Compressive Strength

7th day Compressive strength 32 MPa 28th day Compressive strength 43 MPa Specific gravity 2.71 2) Fine Aggregate- Fine aggregate (FA) used in this investigation was the natural river sand passing completely Stone Dust in Concrete: Effect on Compressive Strength Amit Kumar Singh, Vikas Srivastava, V.C. Agarwal

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[Solved] The compressive strength of 100 mm cube as ...

For cube test two types of specimens either cubes of 15 cm × 15 cm × 15 cm or 10 cm × 10 cm × 10 cm depending upon the size of aggregate are used. For most of the works cubical moulds of size 15 cm × 15 cm × 15 cm are commonly used. This concrete is poured in …

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Determination of the Compressive Strength of Concrete from ...

ceramics aggregates increased from 0% to 20% resulting in 45% and 11.3% decrease respectively in the optimum compressive strength which is 18.10 N/mm 2. Compressive strength of concrete from fine ceramics as partial replacement and stone dust as a full replacement for river sand, decrease as the percentage of fine ceramics increase, giving 11.3 ...

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Influence of aggregate size on compressive strength of ...

It can be seen that when the aggregate size is below a certain value (about 7 mm), the compressive strength increases rapidly with the increase of aggregate size. However, when the aggregate size is beyond 7 mm, the increase of aggregate size does not have a significant effect on the compressive strength. Table 4.

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Compressive Strength of Concrete and Concrete Testing ...

The rate of loading is 0.6 ± 0.2 N/mm 2 /s. Record the maximum force from the machine. The same procedure is followed in the testing of concrete cylinders also. Compressive strength can be calculated from the following equation. Compressive Strength = Applied Maximum Load / …

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Aggregate Crushing Value Test - Procedure And Result ...

Aggregate Crushing value is a relative resistance of aggregates to crushing under gradually applied compressive load. Aggregate Crushing Value Test is important to test to be performed on aggregate. The strength of aggregate parent rock is determined by preparing cylindrical shape specimens of size 25 mm diameter and 25 mm height.

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COMPRESSIVE STRENGTH OF STEEL SLAG AGGREGATE AND ...

The compressive strength calculated by formula fcu = P/A Where, fcu = compressive strength of cube, MPa or N/mm2 P = compressive load at failure, N A = area of loading, mm2 Fig.1: Test arrangement for compressive test SR.NO. WATER CEMENT F.A C.A 1. 191.58 383.16 556.59 1256.04 2. 0.5 1 1.45 3.27

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Effect of the Aggregate Size on Strength Properties of ...

3.1. Compressive Strength 3.1.1. Content Factor. Figure 4 shows the correlation between the compressive strength and the content of recycled aggregate (R and S) for recycled concrete with two water to cement ratios of 0.47 and 0.53. The strength of recycled concrete that included R and S was lower than that of control concrete; the value of ...

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Effect of Coarse Aggregate Size and Grouting Process on ...

3.2. Compressive strength Compressive strength of PAC produced by both gravity and pumping process was investigated as per ASTM C 39 [19]. Average of three cylindrical specimens of 150 mm diameter and 300 mm height was considered. As shown in Fig. 6, with the decrease in aggregate size, compressive strength reached its peak value at 20 mm aggregate

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Long-Term Compressive Strength Development of Steel Fiber ...

The compressive strength of the concrete was tested using the KSF 2405 standard test method. In this study, cylindrical core specimens were drilled from the concrete and shotcrete test panels of 250 × 600 × 500 mm in size to obtain diameters of 100, 75, and 55 mm to conduct the core compressive strength test shown in Figure 2. This test was ...

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2. If the compressive strength of a 100 mm diameter ...

Determine the yield strength at an offset of 0.002 mmmm, ultimate strength (N) and elongation percent at failure. The elongation percentat failure is 550 500 450 400 wa 350 300 250 200 150 300 so 0.005 00 0.025 003 0035 001 0.01 0102 Stranim Atention test on a steel specimen with a length of 300 mm and weight of 180 grams gave a vted load of 60 kN.

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Influence of Aggregate Characteristics on the Compressive ...

aggregate size was inversely proportional to the tensile strength. However, the compressive strength increased slightly with the increase in the size of aggregate. The structural behavior of concrete is considerably guided by taking into account of various factors including the …

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Workability and Early-Age Strength of Recycled Aggregate ...

Compressive strength of concrete mixes with design strength of (a) 30 MPa (b) 45 MPa (c) 60 MPa. Considering the 60-MPa concrete, the compressive strength of RCA-concrete improved by 25 and 39% through the addition of 43-mm BF at volume fractions of 0.5 and 1%, respectively.

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The Effect of Aggregate Size on The Strength of Concrete

The combined aggregate 10mm and 5 mm size can achieve compressive strength up to 160 Mpa at 28 days [3]. Mineral content in coarse aggregate also influence to the bond strength of the aggregate-concrete mix. Normal concrete compressive strength at …

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5 Type of cement Type of coarse aggregate Compressive ...

See Page 1. water/cement ratio of 0.5 Type of cement Type of coarse aggregate Compressive strength* MPa at the age of (days): 3 7 28 91 Ordinary Portland (Type II) Sulphate-resisting Portland (Type V) Uncrushed Crushed 22 27 30 36 42 49 49 56 Rapid-hardening Portland (Type III) Uncrushed Crushed 29 34 37 43 48 55 54 61 Table 2.0 : Approximate ...

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COMPARISON OF COMPRESSIVE AND FLEXURAL STRENGTH OF ...

This research, comparison of compressive and flexural strength of concrete made from different coarse aggregates written in accordance to British standard. The different sizes of coarse aggregates used are; 10mm, 12 mm and 20mm. These aggregates were used to produce concrete cubes (150mm x 150mm x 150mm) and beans (150 x 150mm x 150mm).

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Basalt Aggregate as Coarse Aggregate in High Strength ...

compressive Strength increased as the percentage of basalt content in the mix is increased. TABLE 1.Curing days for compressive strength test results for M 50 grade concrete mix in N/mm2 S.No: of Curin g Days % of Compressive strength (N/mm2) 0 % basal t 25 % basal t 50 % of basal t 75 % of basal t 100 basal t 1 3 29.81 33.39 36.10 39.88 42.18

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Normalised Strength of Aggregate EPIC Concrete Blocks

To obtain the Normalised strength from the declared unit strength to BS EN 771-3 a correction for shape is needed, factors for which are given in the compressive strength test method (BS EN 772-1). The factors given in BS EN 772-1 generally require interpolation to establish the …

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