Extensive studies made by the Research and Technology Division of the Air Force on development of mixtures for high compressive strength concrete led to the following conclusions: (1)_ workable concrete mixtures with compressive strengths in excess of 10,000 psi at 90 days are feasible; (2) the use of crushed limestone aggregate, graded to a ...
Effects of Nano Silica, Micro Silica, Fly Ash and Bottom Ash on Compressive Strength of Concrete 1148 In Tests C7-C9, cement was replaced by weight 1%, 3% and 5% of nano silica (nS), having average particle size of 10 nm, bought from Chinese supplier. The
A new approach to determination of compressive strength of fly ash concrete using fuzzy logic ... Experimental compressive strength values of the concrete specimens at 3, 7, 28, 90, 180 ... FUZZY LOGIC MODEL FOR COMPRESSIVE STRENGTH OF FLY ASH CONCRETE 895 ratio. A MATLAB program was used for modelling
With addition of fly ash as 10%, 20% and 30% by weight of cement, both of the early age strength and later age strength obtained were decreased Chart-5: Compressive strength variation of concrete when compared with the compressive strength of standard incorporating 30% of recycled aggregates with 2%, 3%, 4% mix.
" The compressive strength of concrete is given in terms of the characteristic compressive strength of 150 mm size cubes tested at 28 days (fck). The characteristic strength is defined as the strength of the concrete below which not more than 5% of the test results are expected to fall."
The replacement of OPC with rice husk ash (RHA) were 0%, 5%, 10%, 15% and 20%. 1% of Calcium Chloride was blended with OPC/RHA in all the test specimens except from control mix. ... The compressive strength of the concrete in 28 days is 52.8MPa, 46.4.2MPa and 42.6MPa, respectively, higher than that of ordinary concrete. In accordance with the ...
The experimental Program consisted of determining the compressive strength of GGBS and FA based geopolymer concrete by casting and testing of cubes of size 150mmx150mmx150mm. Materials Used Fly ash and GGBS are used as binders in this research work.
OPC concrete in terms of the compressive strength gained at 28 days. Ettu et al.(2013) studied the compressive strength gained in concrete containing rice husk ash (RHA).The concrete samples containing RSA up to 15% had a compressive strength comparable to that of OPC concrete at 28 days while it showed a higher strength gained at 90 days above ...
Compressive strength of referral concrete as well as fly ash concrete at 7, 28 and 56 d are given in Table 6 and Fig. 1. It is evident that beyond 28 d, the strength increased with the addition of fly ash. Fig. 1. Compressive strength of fly ash concrete Silicon dioxide (SiO (line chart) (W/C = 0.46). Fig. 2.
In this study, the strength related properties such as compressive strength, splitting tensile strength, flexural strength were calculated in which concrete specimens produced with 0%, 10%, 12.5% ...
The effect of replacing 35 to 50 percent of cement by fly ash, on the compressive strength of lean concrete mixtures (350 lbs/yd 3; 210 kg/m 3) was investigated, using two ASTM Class F and two ASTM Class C fly ashes.. The test results showed that, particularly in lean concrete, fly ash has significant effect on the properties of fresh and hardened concrete.
The geopolymer concrete containing smaller size coarse aggregate retains most of the original compressive strength of geopolymer concrete at elevated temperatures. ... The Eurocode EN1994:2005 to predict the compressive strength of fly-ash-based geopolymer concretes at elevated temperatures agrees well with the measured values up to 400 °C. ...
Compressive strength of 10% replacement by polymer 20% Fly Ash 30% Fly Ash met the strength of Plain concrete. Hence up to 10% Graph No. 3.1 Test results comparison of Plain and fly ash concrete samples cement can be replaced with polymer in construction.
for concrete making. The compressive strength of ternary blended cement concrete containing Afikpo rice husk ash and sawdust ash was specifically investigated. The successful utilization of rice husk ash and sawdust ash in ternary combination with OPC for making concrete would further add value to these wastes and reduce the
MSW ash. For comparison, the 28-day strength of a concrete made with no additive (Batch 5) is shown. Nearly a 300% increase in compressive strength (1400 psi to 5500 psi) is achieved by Batch 30, made with 0.25 gram moles of hydrochloric acid per pound of MSW ash. The results of the 90-day compressive strengths are confused.
Fly ash-15 to 50% Lime-5 to 30% Gypsum-2% Quarry dust-45 to 55% Casting of fly ash brick for different mix percentage Testing of fly ash bricks Compressive strength (7,14,21 days) Water absorption Optimal mix % and strength
Compressive Strength and Embodied Energy Optimization of Fly Ash Based Geopolymer Concrete Brett Tempest 1, Olanrewaju Sanusi 1, Janos Gergely 1, Vincent Ogunro 1, David Weggel 1 1 University of North Carolina at Charlotte, Department of Civil and Environm ental Engineering, 9201 University City Blvd, Charlotte, NC 28223
Compressive strength of concrete with rice husk ash as partial replacement of ordinary Portland cement ... thus improving the compressive strength of the concrete whilst decreasing the amount of ...
Compressive Strength Of Concrete With Different Dosage Of Fly Ash Was Studied As Partial Replacemnet Of Cement. From The Experimental Investigations, It Has Been Observed That, The Optimum Replacement Of Flyash To Cement Without Changing Much Compressive Strength Is 10%.
compressive strength of geopolymer concrete. This paper also deals with the various application, economical and environmental benefits of geopolymer concrete. Key Words: Geopolymer concrete, Fly-ash, GGBS, Alkaline solution, Compressive strength, Environmental benefits . 1. INTRODUCTION
In this paper the effect of fly-ash on workability, setting time, density, air content, compressive strength, modulus of elasticity are studied Based on this study compressive strength v/s W/C ...
Fly ash has glassy, solid or hollow spherical shape. The spherical shape of fly ash influences the workability of concrete. The aimed of this research is to investigate the influence of fly ash on the compressive strength and the shrinkage test of flowing concrete. The content of fly ash varied as 0, 15, 25, 35 and 50% of cementitious material.
concrete in bulk and for achieving the requirement of concrete in bulk, fly ash is being used as a mineral admixture in concrete. In this paper an attempt is made for assessment of compressive strength of Fly ash based cement concrete.
By seeing this context fly ash can be much more effective material used as replacement in concrete as fine Compressive Strength= P/A Mpa aggregate along with cement combination is summarized in …
5.1 Cube and Cylinder Compressive Strength Test ... strength at the age of 7 days for HVHC fly ash concrete mixtures M2 to M7is lower (nearly more than 50% less) and the strength at the age of 28 days is marginally lower nearly 20% less for mixes without SP and slightly
Strength Behaviour of Mortar Using Fly Ash as Partial Replacement of Cement 101 (c) Size of specimens: 50 mm x 50 mm x 50 mm cube for compressive strength and briquet specimens of standard size for tensile strength tests were prepared as per ASTM
RD127 Substitution of Fly Ash for Cement or Aggregate in Concrete: Strength Development and Suppression of ASR 1 The objective of this work was to determine whether the substitution of fly ash for part of the sand (without reduc-ing the cement content) would produce acceptable strength gain in concrete in cold weather while still pro-
An Experimental Study on Compressive Strength of Fiber Reinforced Concrete With Fly Ash. ... The use of fly ash in concrete is found to affect strength characteristics adversely. One of the ways to compensate for the early-age strength loss associated with the usage of fly ash is by incorporating fibers. ... It is observed that the compressive ...
1 Strength development of concrete containing coal fly ash under different curing temperature conditions Mohammed A. Elsageer1, Steve G. Millard1 and Stephanie J. Barnett 1 1 University of Liverpool, D epartment of Engineering, Brodi e Tower, Brownlow Street, Liverpool, UK, L69 3GQ
The effect of using brine on the compressive strength of concrete containing fly ash and admixtures was studied. The term brine, in this investigation, is restricted to the liquid solution obtained from potash mines that contains salts of sodium, potassium, calcium, and magnesium in the following respective percentages: 9.0, 5.0, 5.2, and 5.8.