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    • Influence of Silica Fume on the Geotechnical ...

      The results indicated that silica fume particles increase maximum dry unit weight of sand–cement mixtures and reduce their optimum moisture content. Moreover, silica fume improves unconfined compressive strength of cemented sand which the impact of this improvement is more obvious for samples with longer curing time.

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      A study of the chemical effect of marble and granite ...

      Feb 04, 2020· Test results show that for the control mix (CM), the compression strength was 251 kg/cm 2. By replacing 5% of cement with marble powder in NC5, the compressive strength value dropped by 14%. For sand replacement, and by replacing 10% of sand with marble powder in (NF10), the compressive strength value rises up to 5% above the control CM.

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      PAPER OPEN ACCESS Optimization of cellular lightweight ...

      The optimum compressive strength of 86.13 kg/cm 2 was found in the composition of Portland cement by 40%, silica sand 40% and volume ratio foam to mortar 0.6. Keywords: silica sand, cellular lightweight concrete, factorial

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      Water-Cement-Density Ratio Law for the 28-Day Compressive ...

      In the present contribution, the water-cement-density ratio law for the standard curing 28-day compressive strength of cement-based materials including grout, normal concrete, ceramsite concrete, and foamed concrete is proposed. The standard curing 28-day compressive strength of different grouts, normal concrete, ceramsite concrete, and foamed concrete was tested.

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      EXPERIMENTAL ANALYSIS ON EFFECT OF NANO SILICA ON THE ...

      Compressive Strength of specimen with nano-silica 0.5% 7-DAY TEST RESULT Strength Sample No. Weight (kg) Load (tonne) Compressive Strength (MPa) 1 8.26 66 29.21 2 8.08 72 30.95 3 8.09 76 22.67 MEAN 27.61 Compressive Strength of specimen with nano-silica 1% 7-DAY TEST RESULT Sample No. Weight (kg) Load (tonne) Compressive Strength

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      Effect of Dilution and Contaminants on Sand Grouted with ...

      The unconfined compressive strength of the grouted sand, measured after 7 days, was proportional to the silica concentration, up to a maximum of 400 kPa. The hydraulic conductivity of the grouted sand decreased with increasing silica concentration in a nearly log-linear manner down to a minimum of 2 × 10 −9 cm/s, and was below 1 × 10 −7 ...

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      An Experimental Investigation on Strength Properties of ...

      Silica then F.A by Manufactured Sand". Concrete specimen incorporated with 15% micro silica and 50% manufactured sand was found to be good in compressive which has 23.9% more than that of the conventional concrete when checked for 28days curing period. 3. MATERIALS USED IN CONCRETE

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      Experimental Investigation of Concrete with Combined High ...

      4.5 Tests on Strength 4.5.1 Compressive Strength of Cement (N/mm2) Fig 3: Comparison of strength development of Cement using river sand and M-Sand Fig 4: compressive strength of cement testing setup 4.6.2 Compressive Strength of Concrete (N/mm2) Fig 5: Comparison of Cylindrical compressive Strength development of normal concrete 0 10 20 30 40 50

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      EVALUATION OF COMPRESSIVE STRENGTH AND .

      to achieve higher compressive strength and better permeability by 5- 15 % replacement of cement with micro silica and 7.5% of coarse aggregate with sand. Freshened concrete test for each mix were carried out and the data were collected. Index Terms: compressive strength, micro silica, pervious concrete, permeability, pavements, porosity

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      Compressive Strength Performance of Reactive Powder ...

      The maximum modification that's obtained in case of porcelain aggregate was (24.14) % at age (90) days for 20% replacement. Using glass waste caused an increase in the overall values of the compressive strength for all the adopted replacements with less efficient than porcelain to reached (20.69) % at age (90) days for 20% replacement.

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      Effect of Micro Silica on The Strength of Concrete with ...

      Compressive Strength test results in N/mm 2 Mix Description Plain 5 SF 10 SF 15 SF 20 SF % adding of silica fume 0 % 5 % 10% 15 % 20% 7 Days 23.2 28.4 32.1 33.2 32.1 14 Days 28.7 30.5 34.4 37.4 36.3 28 Days 34.7 43.8 45.7 48.3 45.5 Conclusion Silica fume increases the strength of concrete more 25%. Silica

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      Silica Fume and Nanosilica Effects on Mechanical and ...

      Adding the appropriate amount of silica fume (SF) or nanosilica (NS) can improve the strength and reduce the shrinkage of foam concrete (FC), thereby widening its application. This paper reports on a study of FC mechanical and shrinkage properties when varying SF and NS proportions were used to replace cement. Scanning electron microscopy (SEM) and nonmetallic ultrasonic detection were ...

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      Hot Compressive Strength and Deformation of Sand Mold

      Hot compressive strength and deformation of silica, olivine, zircon and chromite sand molds bonded by sodium silicate or bentonite were investigated. Sodium silicate bonded sand mold have the maximum hot strength at 200°C and 500°C, and bentonite bonded sand molds have it at 900°C.

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      EFFECT OF RETEMPERING ON CONSISTENCY, COMPRESSIVE .

      The Compressive Strength Test The compressive strength test was carried out in accordance with BS 1881: Part 116 [26]. Samples were prepared for compressive strength testing from the original mix and after retempering in order to study the effect of retempering on the concrete mixes of this investigation.

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      Use of Silica Sand as Fine Material in Concrete

      Use of Silica Sand as Fine Material in Concrete J.V.Kerai1 S.R. Vaniya2 1,2Department of Civil Engineering 1,2DIET-RAJKOT Abstract—concrete made from silica sand as partial replacement of fine aggregate will be studied for workability, compressive strength, tensile strength, and modulus of elasticity.

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      Lime mortar - Wikipedia

      Lime mortar is composed of lime and an aggregate such as sand, mixed with water.The Ancient Egyptians were the first to use lime mortars. About 6,000 years ago [citation needed], they used lime to plaster the pyramids at Giza.In addition, the Egyptians also incorporated various limes into their religious temples as well as their homes. Indian traditional structures built with lime mortar ...

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      EXPERIMENTAL ANALYSIS ON EFFECT OF NANO SILICA ON THE ...

      Compressive Strength of specimen with nano-silica 0.5% 7-DAY TEST RESULT Strength Sample No. Weight (kg) Load (tonne) Compressive Strength (MPa) 1 8.26 66 29.21 2 8.08 72 30.95 3 8.09 76 22.67 MEAN 27.61 Compressive Strength of specimen with nano-silica 1% 7-DAY TEST RESULT Sample No. Weight (kg) Load (tonne) Compressive Strength

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      Effect of binder and silica sand on unconfined compressive ...

      T1 - Effect of binder and silica sand on unconfined compressive strength of cemented peat. AU - Sing, Wong Leong. AU - Hashim, Roslan. AU - Ali, Faisal. PY - 2011/7/1. Y1 - 2011/7/1. N2 - The aim of this paper is to evaluate the unconfined compressive strength of cemented peat in comparison to that of untreated peat.

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      Effect of Curing Methods on the Compressive Strength of ...

      The compressive strength of the silica fume high strength concrete, as in normal strength concrete, is directly related to curing duration. ii. The adverse effect on the development of concrete compressive strength increases with increasing ... The sand is uniformly graded while the crushed granite aggregate is well graded. The maximum size of ...

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      Foundry sand testing - Wikipedia

      Foundry sand testing is a process used to determine if the foundry sand has the correct properties for a certain casting process. The sand is used to make moulds and cores via a pattern.In a sand casting foundry there are broadly two reasons for rejection of the casting — metal and sand — each of which has a large number of internal variables.

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      (PDF) Strength Performance on Different Mix of Cement-Sand ...

      Dry density, 28-day compressive strength, and thermal conductivity and pore structure tests, were conducted to investigate the effects of silica fume on the properties of foamed concrete.

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      Effect of replacement of River sand by M-sand in high ...

      compressive strength and split tens ile strength of concrete using M -sand as fine aggregate inst ead of river sand. And compare the results obtained fr om both the river sand and the M -sand. In order to achieve the strength, cement is replaced by silica fume by 15% in weight and also 1.2% weight of

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      Some Useful Numbers

      Sand 30-40 Gravel 35 Silt 34 Clay 20 Loose sand 30-35 Medium sand 40 Dense sand 35-45 Gravel with some sand 34-48 Silt 26-35 Because the angle of internal friction,, is typically around 25-35, the coefficient of internal friction (tan is 0.5 to 0.7 Cohesive strength ( 0) Rock 10,000 kPa

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      EVALUATION OF COMPRESSIVE STRENGTH AND .

      Compressive strength of pervious concrete mix with 10% microsilica is more than double the value of compressive strength of the mix having 0% microsilica content.28th day compressive strength is gradually increasing upto the mix with 10% microsillica and reaches the maximum value of 13.3 MPa.

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      Water-Cement-Density Ratio Law for the 28-Day Compressive ...

      In the present contribution, the water-cement-density ratio law for the standard curing 28-day compressive strength of cement-based materials including grout, normal concrete, ceramsite concrete, and foamed concrete is proposed. The standard curing 28-day compressive strength of different grouts, normal concrete, ceramsite concrete, and foamed concrete was tested.

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      A study on strength characteristics of mortar and concrete ...

      Cement mortar mixes developed 28 days compressive strength which ranges from 49.77 MPa to 18.77 MPa and sulphate attack values ranges from 47.52 MPa to 28.69 MPa. The results indicate that the properties of the cement mortar made from silica sand as partial replacement of fine aggregate showed only a marginal increase in strength.

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      INTERNATIONAL JOURNAL OF SCIENTIFIC & TECHNOLOGY .

      and Metakaolin content in the cement. The compressive strength results showed that the at 10% Silica fume in the cement with 40% Foundry sand in fine aggregates gives better compressive strength with respect to Metakaolin for the same 28days period. Index Terms: Foundry sand, Silica fume, Metakaolin, Fine aggregates, Cement, Compressive strength.

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      Strength of Nano Concrete using Nano Silica – IJERT

      The compressive stress, split tensile strength and flexural strength of concrete are determined by casting cubes of size 150x150x150 mm, cylinders of size 300×150 mm and prisms of size 500mmx100mmx100mm and allowed for 7 and 28 days curing and the test results were obtained for various percentage of Nano silica.

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      Effect of fly ash and silica fume on compressive strength ...

      Jun 01, 2011· Effect of fly ash and silica fume on compressive strength of self-compacting concrete under different curing conditions. ... 20 mm nominal maximum size dolomite is used as coarse aggregate and the fine aggregate was the natural sand free from impurities. 3.1.3. Chemical additives ... Compressive strength for type II: (a) cement content = 550 kg ...

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      Silica Fume and Nanosilica Effects on Mechanical and ...

      As SF ratios increased from 0% to 15% and NS ratios increased from 0% to 4%, FC compressive strength at 7 and 28 days gradually increased. FC compressive strength at 7 and 28 days reached its highest level of 21.7 MPa and 32.8 MPa when SF was 15% whereas it was 24.9 MPa and 35.8 MPa when 4% NS was blended.

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