Quartzite was found to have the highest average compressive strength of 24.48N/mm2 with an average density of 2160kg/m3, while compressive strength of crushed granite was …

In this study effect of coarse aggregate size and gradation on workability and compressive strength of concrete was investigated. A mix ratio of 1:2:4 with a target strength of 20/25MPa, was ...

This study investigates the use of waste ceramic tiles as coarse aggregates in concrete at replacement levels of 0, 10, 20, 30, 50, and by weight of natural coarse aggregate. Concrete cylinders were cast and tested for compressive and splitting tensile strength after a curing period of 7, 14, and 28 days.

The relationship between changes in compressive strength and aggregate volume fractions was analyzed considering the effect factor of each aggregate on the compressive strength and at 2 conditions ...

Compressive Strength of River Quarry 1 Aggregates fc' Compressive Strength in MPa Curing Time 7 days 14 days 28 days RQ1 Sample 1 13.71 18.03 22.76 RQ1 Sample 2 12.86 19.36 23.88 RQ1 Sample 3 13.05 16.23 21.56 Average 13.21 17.87 22.73 TABLE 5. Compressive Strength of River Quarry 2 Aggregates fc' Compressive Strength in MPa

Fig. 6 shows the results of the compressive strength development in terms of average compressive cube strength R cm, according to the procedure described in Section 2.2. The results confirm that the initial moisture content of the recycled aggregates plays an important role in the development of the compressive strength of concrete (Fig. 6).

Depending on the type of parent rock gives the different crushing values of aggregate as a compressive strength varying from a minimum of about 45 MPa to a maximum of 545 MPa. ... Determination of Aggregate Crushing Value Crushing Strength of Coarse Aggregate. Aggregate Crushing value test IS Code is 2386-4 (1963): Methods of Test for ...

between the maximum coarse aggregate size and the compressive strength follows a polynomial with R 2= 1; indicating that the model is reliable. The optimum maximum coarse aggregate size for the best compressive strength of 28 day concrete was therefore found to be 8mm for the water/cement ratio of 0.63. The analysis

In Table 1, we present the types and properties of coarse aggregates commonly used in UHPC, as referenced from the engineering geology manual [8].The aggregates in the table are mainly divided into carbonate and silicate types. Basalt and Diabase, due to their elastic modulus exceeding 70 GPa and compressive strength over 160 MPa, are frequently used in …

The research aimed to identify the potentiality of coconut shells and coir fiber as partial coarse aggregate replacement to concrete hollow blocks in terms of compressive strength, water ...

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 …

Key parameters examined include workability, compressive strength, flexural strength, split tensile strength, microstructural characteristics (XRD, SEM, EDAX), and modulus of elasticity. A distinctive feature of this research involves systematically replacing conventional coarse aggregates with RCA at varying proportions: 0, 25, 50, 75, and .

The effects of high-temperature treatment and ball-mill treatment on recycled coarse aggregates (RCA) and recycled fine aggregates (RFA) were investigated in this study by comparing the physical properties such as water absorption, void ratio, density, crushing index and residual paste content of recycled aggregates before and after treatments and the flexural …

The compressive strength of the concrete cube was greatly affected by the shape of aggregate used and it was noted that; for lower percentage of flaky and elongated aggregate the compressive ...

research work was carried out to determine the use of palm kernel shell as a partial replacement for coarse aggregate in concrete taking into consideration the compressive strength and water absorption capacity.The following tests were carried ;visual test,e analysis,speci˜c gravity test,slump test,water absorption test and compressive strength

The compressive strength changes with aggregate size can be mainly attributed to the effect of aggregate size on pores characteristics and cementitious paste thickness. It is found that the compressive strength is most sensitive to the content of the small pores (0–1.5 mm 2). The increase of the small pores content will decrease the ...

The study utilize cement of the same strength (42.5R), coarse aggregate of the same size (10mm), the same water/cement ratio (0.6), and concrete mix (1:2:4) in order to determine the influence of ...

compressive strength of concrete made with 50% replacement of natural coarse aggregates with coarse aggregates from demolishing waste. Basic properties: water absorption, specific gravity, and ...

At 28th day 10mmcoarse aggregate size gave 23.524 Mpa compressive strength which is themaximum compressive strength from the remainder coarse aggregates so,the optimum maximum size of coarse ...

For each type of coarse aggregate 75 cubes (150x150mm) were cast to allow the compressive strength to be monitored at 3, 7, 14, 21, and 28 days. Test result show that concrete made from river...

The improvement in strength from 7 days to 28 days was almost 22% for all samples. The figure also exhibits that the increase of fine amount with respect to the coarse aggregate enhances the compressive strength. Mix 1 recorded a compressive strength of 79.4 MPa at age 28 days. The strength increased to 81.5 MPa for mix 2 and 83.4 MPa for mix 3.

The results were then linked against the fineness modulus of the fine aggregates. Concrete compressive strength decreased as the fineness modulus of fine aggregates decreased. ... coarse aggregate ...

A total of 12 cubes of 150 mmx150 mmx150 mm size were cast f or each type of fine aggregate. Compressive strength were monitored for 7, 14, 21 and 28 days. ... as coarse aggregate yield higher ...

1)Compressive Strength. The maximum strength shown by aggregates when subjected to compression gives their compressive strength. It is to be remembered that crushed stones are obtained from by squashing large-sized boulders. Therefore, aggregates are intrinsic materials and their compressive strength depends largely on the rock type that is crushed (for …

A total of 12 cubes of 150 mmx150 mmx150 mm size were cast f or each type of fine aggregate. Compressive strength were monitored for 7, 14, 21 and 28 days. ... Coarse aggregates are usually ...

Compressive strength is the basic mechanical properties and one of the indicators to determine the performance of a concrete. In this paper, the effects of various percentages (0%, 25%, 50%, 75% ...

This paper presents a comprehensive theory describing the influence of aggregate on the compressive strength of concrete. A first distinction is made between topological and …

When the volume fraction of coarse aggregate ranges from 0% to 50%, the compressive strength of the concretes with different strength level has the similar development trends, which indicates that the compressive strength may have a certain relationship with the relative proportion of coarse aggregate and mortar. de Larrard [10] consider that a ...

This paper reports the results of a study undertaken to investigate the effect of four different types of coarse aggregate on the compressive strength, flexural and splitting tensile …

Coarse aggregate (CA) is one of the major components in normal cement concrete. However, CA is excluded from the mixture of Engineered Cementitious Composites (ECC), due to its negative effects on material's tensile behavior. ... The strain at peak compressive strength ranges from 2660 to 5040 µε, still higher than that of normal concrete ...