The results obtained from compressive strength testing are presented in Table 1. Table 1 Compressive Strength (Nmm-2) It is seen from Table 1 that for the control mix, the compressive strength of concrete increased from 23.36Nmm-2 at 7days to 28.64 Nmm-2 at 28days.The compressive strength at 25% replacement increased from 9.54 Nmm-2 at
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The results obtained from compressive strength testing are presented in Table 1. Table 1 Compressive Strength (Nmm-2) It is seen from Table 1 that for the control mix, the compressive strength of concrete increased from 23.36Nmm-2 at 7days to 28.64 Nmm-2 at 28days.The compressive strength at 25% replacement increased from 9.54 Nmm-2 at
A. As the nominal maximum size of the aggregate is increased, the amount of water needed for the same workability is reduced. At the same cementitious material content, strength is therefore greater because the w/cm is lower. But in the high-strength range, over 40 MPa (5800 psi), higher compressive strengths are usually obtained at a given w ...
effect on compressive strength of concrete made with crusher ... The compressive strength of concrete from ... and gravel quarry, mining, coal mining, concrete ... water and dust proofing while Concrete is also ...
From Tables 5 and 6, it has been shown that the compressive and tensile strengths of recycled concrete both have obvious size effects.In general, the mean value of strength decreases gradually with the increase of specimen size. Taking the specimens with a side length of 70 mm as the reference group, the degrees of size effect for other groups can be computed as
sense of workability and compressive strength. The study shows that compressive strength of concrete made using stone dust as fine aggregate replacement having greater value in comparison of conventional concrete whereas the workability of concrete was decreased rapidly with the increment of stone dust in concrete.
Apr 29, 2021 By analyzing the compressive strength of the concrete cubes of three different sizes, Neville 21 found that the smaller the size, the more obvious the size effect of concretes compressive strength. Jin 22,23 carried out numerical analysis and theoretical research on the impact of the size effect and strain rate coupling on the
Sep 01, 2016 The compressive strength of concrete increased with the addition of iron powder (IP) as partial replacement of sand. The results showed that the compressive strength continues to increase with increased iron powder ratio. At 10%, the increase was 19% and at 20% was 33%.
An attempt is made to study the effects of stone dust ass fine aggregate on the strength and workability aspects of concrete mixes.It is evident that the concrete strength development depends upon the strength of the cement mortar and its synergetic with coarse aggregate.
Jul 01, 1996 Compressive Strength. The results of compressive strength for 7 and 28-day are shown in Fig. 2. The figure represents the average of two and three tests for 7 and 28-day, respectively. It can be seen from Fig. 2 that the compressive strength in 7 and 28 days increases to a maximum of 22.47 and 32.38 MPa respectively at a dust content of 10%. As ...
The results obtained from compressive strength testing are presented in Table 1. Table 1 Compressive Strength (Nmm-2) It is seen from Table 1 that for the control mix, the compressive strength of concrete increased from 23.36Nmm-2 at 7days to 28.64 Nmm-2 at 28days.The compressive strength at 25% replacement increased from 9.54 Nmm-2 at
design mix with sand and crusher dust as fine aggregates, granite metal and floor slab chips as coarse aggregates. The strength parameters cube compressive strength, Split tensile strength flexural strength on prisms and compressive strength for short column were compared at 7
WITH COMPLETE REPLACEMENT OF NATURAL SAND BY CRUSHER DUST M A SALMAN1, CH.HITHENDER REDDY2 ... concrete compressive strength and split tensile strength values are determined. Attempts have been made to study ... without the undesirable effects of postponement and segregation 1. With proper use of
115 www.erpublication.org AbstractStone dust is a waste material obtained from crusher plants. It has potential to be used as partial replacement of natural river sand in concrete. Use of stone dust in concrete not only improve the quality of concrete but also conserve the natural river sand for future generations. In the present investigation, an experimental program was carried out to study ...
affected. To find the loss in strength the concrete cubes were kept at 100oC at an age of 28 days for 24 hrs in an oven and then tested in CTM. The strength obtained is presented in Table 4. Table 4 Mean Compressive strength of concrete at 100oC Fine aggregate Sand Quarry dust 28 days Compressive strength ( in MPa) M20 M25 1000 17.63 24.37
aggregate sizes of 10 mm and 20 mm conducted by Su and Cheng (2013) concluded that normal strength concrete with compressive strength lower than 60 MPa, larger maximum aggregate sizes would yield a lower compressive strength, but for high strength concrete with compressive strength greater than 80 MPa the effect of aggregate size was insignificant.
et al. 30 reported strength of quarry rock dust concrete was comparably more than that of similar mix of conventional concrete. Hameed and Sekar 31 studied effect of crushed stone dust as fine sand and found the flexural strength increases than the concrete with natural sand but the values decreases as percentage of crusher dust increases.
the size effect, the strength of a member tends to decrease when its size increases. Therefore, in view of recent increased interest in the size effect of concrete this research focuses on the size effect of two main classes of compressive strength of concrete pure axial compressive strength and exural compressive strength.
Concrete 55 5.2 Effect of size of aggregate on Fresh properties of Self 56 Compacting Concrete 5.3 Effect of size of aggregate on Mechanical properties of 56 Self Compacting Concrete 5.3.1 Compressive Strength 56 5.3.2 Split Tensile Strength 59 5.3.3 Flexural Strength 61
WITH COMPLETE REPLACEMENT OF NATURAL SAND BY CRUSHER DUST M A SALMAN1, CH.HITHENDER REDDY2 ... concrete compressive strength and split tensile strength values are determined. Attempts have been made to study ... without the undesirable effects of postponement and segregation 1. With proper use of
optimum increase in compressive strength at 7 days. The compressive strength obtained for 0.8% e-waste fibres and 3cm length fiber for 7 days is 31.11N/mm2. Table -3 Compressive strength data at the age of 28 days in N/mm2 Chart -1 Compressive strength for 28 days The 28 day compressive strength for normal concrete is
The thesis titled Effect of Size and Shape of Test Specimens on Compressive Strength of Normal Strength Concrete submitted by S.M. Habibul Ahsan, Roll No. 0413042335, Session April 2013 has been accepted as satisfactory in partial fulfilment of the requirement
Compressive strength is initially checked by doing mix design to make sure the grade of concrete considered in the structural design is achieved. Concrete cube testing or cylinder testing is done to check the development of the strength of the concrete. In other words, we test the concrete to check whether it has reached or developed beyond the ...
The objectives of this paper are two-fold. First, it compares the size effect formulae, (1) and (2), for tests on high strength concrete (HSC, nominal compressive strength 110 MPa) with a view to identifying their ranges of applicability. Beams (span to depths ratio of 4) with
GGBS effect was studied as replacement to cement in varied proportions of 10, 20, 30 and 40% and the size of particles for each replacement is varying from 90 m-75 m, 75 m-45 m and 45 m. The results show that, at 30% replacement of cement, the compressive strength is optimum for particle size of
aggregate size. Studies by Vilane and Sabelo 11 investigated compressive strength of concrete made from 9.5mm, 13.2mm and 19.0mm aggregates. Results indicates that compressive strength of concrete increased with increase in aggregate size. Rozalija and Darwin 12 studied the effect of Aggregate type, size and content on concrete strength
aggregate on compressive strength of concrete. The preceding section discusses the various literature on the materials and test on concrete. It also discusses relevance of compressive strength of concrete, average compressive strength of concrete with crush granite and quartzite and factors that accounts for the variation in strength.
Table 10 . Comparison of the compressive strength of concret e made with quarry dust and that made with river sand as fine aggregate after 28 days curing (Q quarry dust, S river sand) . S/N Mix ratios Water content Cube strength, Q (N/mm 2) Water content Cube strength S (N/mm 2) 1 0.45112.5 0.45 21.00 0.52 15. 09
Feb 15, 2019 Aggregate crushing value gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. The aggregate crushing value should not exceed 45% for aggregate used for concrete other than for wearing surfaces, and 30 % for concrete for wearing surfaces, such as runways, roads for pavements.
for the determination of the quality of concrete (Troxel et al 1968) and as such it becomes necessary that for a concrete to be used, its compressive strength has to be determined. So here comparison is made between the compressive strength of concrete made with river sand and that made with quarry dust as fine aggregate in the production of
The authors experimentally studied the size effect of axial compressive properties of concrete cube and slenderness ratio of 21 prism with cross-section side length of 100mm to 800mm in this paper. Commercial concrete was used for test specimens. Specimens were cast and cured outdoors. To highlight the size factors, accumulation of sand on the end surface of the specimen was used to
SPECS. Crusher Dust (0-4 mm) This type of aggregate is used for making various reinforced concrete structures. It is also used in Road construction The shape of the particles help make concrete more cohesive, perfect gradation ensures fewer voids and increases the compressive strength.
Studies by Vilane and Sabelo 11 investigated compressive strength of concrete made from 9.5mm, 13.2mm and 19.0mm aggregates. Results indicate that compressive strength of concrete increased with increase in aggregate size. Rozalija and Darwin 12 studied the effect of Aggregate type, size and content on concrete strength and fracture energy.
natural sand by stone dust increases the compressive strength of concrete by 5-22%, and found that amongst all the mixes the highest compressive strength was obtained for 40% replacement of sand by stone dust. % Mixes (Sand Stone Dust) Compressive Stress (N/Sq. mm) (10000) 19.25 (7030) 20.89 (6040) 21.33 (5050) 22.67
(2003) reported significant increase in compressive strength, modulus of rupture and split tensile strength when 40 percent of sand is replaced by Quarry Rock Dust in concrete. Nagaraj (2000) studied that the consumption of cement content, workability, compressive strength and cost of concrete made with Quarry Rock Dust.
compressive strengths, while in normal-strength concretes, coarse aggregate strength has little effect on compressive strength. Other research has compared the effects of limestone and basalt on the compressive strength of high-strength concrete (Giaccio, Rocco, Violini, Zappitelli, and Zerbino 1992). In concretes containing basalt, load
aggregate on compressive strength of concrete. The preceding section discusses the various literature on the materials and test on concrete. It also discusses relevance of compressive strength of concrete, average compressive strength of concrete with crush granite and quartzite and factors that accounts for the variation in strength.
