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Jul 01 2005 The change in aggregate to cement ratio has much greater influence on abrasion resistance than changes in compressive or splitting tensile strength of concrete pavers. Naik et al. 7 determined the abrasion resistance of Class C fly ash concrete proportioned to have five levels of cement replacements 15 30 40 50 and 70.
Jul 01 2016 Li Beixing et al. investigated the effect of M-sand on strength and abrasion resistance of pavement cement concrete by using surface abrasion test with rotating cutter method. He reported that with increase in M-sand of micro fines 4.3 to 20 by mass increased the strengths and improved abrasion resistance of concrete.
Mar 19 2021 The water cement ratio used was 0.5. Test and Laboratory Procedure. The different physical amp mechanical properties of coarse aggregate such as specific gravity water absorption aggregate crushing value aggregate impact value amp aggregate abrasion value were found out for the coarse aggregate obtained from the different
The results of compressive strength experiment showed that due to reduction of water-cement ratio from 0.33 to 0.50 the compressive strength improved by 34.4 and 35.2 respectively. The results for abrasion experiments showed that due to reduction of water-cement ratio from 0.50 to 0.33 the abrasion strength improved by 36.13.
In this study the influence of water-cement ratio on the mechanical properties compressive abrasion tensile flexural strength and permeability of Nano-silica concrete reinforced with polypropylene fibers is evaluated. The specimens contain 4 of Nano-silica 0.30 0.35 0.40 0.45 and 0.50 of water-cement ratios and 0 0.10 0.15 0.25 and 0.35 percent by volume of polypropylene fibers.
Rain effect the water cement ratio of the area exposed to wetting. It produces low strength concrete having less compressive strength. Further it reduces the durability of the concrete and as a result it could affect the reinforcement within the concrete. Ultraviolet Resistance. Ultraviolet waves in solar radiation do not harm the concrete .
The effects of air content water-cement ratio and aggregate type on the flexural fatigue strength of plain concrete Thomas Lee Thomas . 28-day compressive strength versus percent air. Modulus of rupture versus percent air. Unit weight versus percent air. Figure 8. Failure surfaces of test specimens.
The effect of fibers and Nano silica in four different percentages at 0.1 0.2 0.3 and 0.4 percent by volume for fibers and 3 percent for Nano silica in concrete with water to cement ratio of 0.33 0.36 0.4 0.44 and 0.5 have been compared and evaluated. In total more than 425 cubic and cylindrical specimens were made according to ASTM .
This research work aims at using cow dung powder CDP as partial replacement for cement in concrete production. The percentage replacements were varied from 0 5 10 15 20 25 and 30 with water cement ratio varied from 0.54 0.57 0.60 0.64 0.68 0.72 and 0.77. The mixing ratio was 124. The result of chemical analysis conducted on cow dung powder shows that it is pozzolanic.
The compressive strength increased from about 40 M2 to 45 M1 beyond which the compressive strength decreased linearly as the coarse aggregate content increased. 3.2. Abrasion Resistance. Effect of the number of revolution of abrasion wheel on wear resistance of various mix proportions is summarized in Figure 7.
The water-cement ratio is one of the key factors effecting on concrete properties. Abrasive resistance porosity efficiency and like all are directly or indirectly affected by the above parameters. In engineering work the underlying assumption is the fact that the compressive strength of the concrete gained on a specific temperature depends on two factors including water cement ratio and degree of density.
Reactive Powder Concrete RPC is characterized by high cementitious material content very low water to cement ratio and steel micro-fiber reinforcement. This type of cementitious composite has greater ductility durability and mechanical properties
Abstract In this research work the effect of salt water and fresh water on the compressive strength of concrete is investigated. For this the concrete cubes were casted for a mix design of M-40 11.302.63 by weight and 0.50 water-cement ratio was considered. The salt of various proportions like 25
Sep 30 2018 The aims of the research are to determine the compressive strength abrasion and water absorption of the interlocking block by different proportion of cement added to the aggregate. Secondly to determine the effect of alkaline solution to the compressive strength.
Mar 01 2016 In order to produce normal and high strength concretes 10 20 and 30 replacement ratios of PVC powder and granules by volume of aggregate are used. Slump fresh and hardened densities compressive strength capillary water absorption and abrasion were tested on all concrete types. As the PVC ratio increases important changes are seen in .
May 25 2015 The effective watercement ratio for workability is more difficult to define. It can be assumed provisionally that initially dry aggregates will have achieved at the time of the workability test the same degree of saturation as they would have in water. These effects of absorption only apply to high-strength mixes.
Decreasing the water-cement ratio from 0.46 to 0.30 improves the abrasion resistance of Nano silica concrete by 42 the hydraulic conductivity coefficient of concrete decreases from 28.510-15 to.
Oct 26 2017 Effect of Aggregate Cement Ratio on Workability of Concrete. Aggregate cement ratio is the ratio of weights of aggregate to the weight of cement. If this ratio is more that implies aggregates are more and cement is less and if this ratio is less that implies weight of aggregate is less and weight of cement is more relatively.
Feb 01 2012 Accordingly the highest resistance to abrasive erosion has the concrete made with the watercement ratio 0.5 and the addition of F120 type fibers where the value of the abrasion erosion rate is E R 0.1356 and the lowest the benchmark concrete made with the watercement ratio 0.7 where the value is E R 0.1944.
According to the results obtained the optimal amount of fiber used is 0.3 for flexural and tensile strength but only 0.1 for compressive strength by volume of concrete while 0.2 by volume proved best for hydraulic conductivity coefficient and abrasion strength with 3 nano silica mixed in.
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