of activating solution, curing method, and source of fly ash on compressive strength of fly ashbased geopolymer concrete. The experimental results indie that, the source of fly ash has directly effect on compressive strength and the curing condition has not significantly effect on compressive strength when silicafume was used in the activating solution. Nikoloutsopoulosa at al [7 ...

The most important property of pervious concrete is its permeability and compressive strength. But it is seen that pervious concrete generally possesses low compressive strength which can be improved by various cementitious material. The aim of this research is to assess the use of silica fume, fly ash and YC819 on pervious concrete ...

Thammasat Int. J. Sc. Tech.,,, JanuaryApril 2000 Compressive Strength Prediction Model for Fly ASH Concrete Nipat Nipatsat and Somnuk Tangtermsirikul Sirindhorn International Institute of Technology, Thammasat University, Patumthani Abstract This study is aimed at finding an equation for estimating compressive strength of concrete

Predicting Compressive Strength of Concrete ... Kazberuk and Lelusz [2] proposed regression models to predict compressive strength of concrete with fly ash replacement percentages up to 30%. Namyong et al. [3] proposed the regression equations for predicting compressive strength of insitu concrete. They have selected Corresponding author; email:rachnaaggarwall976 .

replacement in concrete. It is recommended that the optimum replacement level of OPC by POFA is 20% for a good strength in compressive test. Index Terms Palm Oil Fuel Ash, Pozzolanic material, Compressive Strength I. INTRODUCTION t is known that there are several causes of global warming, including CO 2 from cement. Approximately 5% of total CO 2

PREDICTION OF CONCRETE COMPRESSIVE STRENGTH USING MATHEMATICAL REGRESSION MODEL JAROD WILSON1, EZRA JONES1, MURRAY DICKSON1 ¹ Holcim NZ Ltd, Christchurch, New Zealand ABSTRACT In this study a mathematical model is proposed and developed using multivariate regression equation for the prediction of concrete compressive strength at different ages ( 7 .

strength was lower that of OPC concrete when slag replaced 80% of OPC in the concrete. Similarly, HuiShen et al. [5] concluded that a slag replacement level of 15–30% was optimal dosage to get the same strength as in OPC concrete at 28 days. The dosage of fly ash is generally less than 40% by weight of cement to get the same compressive ...

Fly ash based geo polymer concrete with robo sand and its respective compressive strength. Keywords—Fly ash, robo sand, metakaiolin, ... 5) Low compressive strength and UPV values are resulted due to the use of light buff coloured metakolin ash 6) For every 20% addition of fly ash increase the UPV values for GPC and increase the quality of concrete. REFERENCES [1] IS 13311(part .

 · showed that the high performance compressive strengths of the fly ash concrete were MPa; and MPa respectively for 30, 40 and 50 percent of fly ash in cementitious materials. For flexural test results, the highperformance of 28 days fly ash concretewere MPa, 4 MPa and MPa respe ctively for 30; 40 and 50 percent of fly ash in cementitious materials. The waterto ...

Effect of fly ash on the compressive strength of concrete The effects of fly ash on the strength of concrete mixes are presented in Figures 2 to 5. Figures 2 and 4 show the strengths of the fly ash concretes relative to the control concretes at the ages of 7, 28, 56 and 90 days. It can be seen that the fly ash concrete samples had a lower compressive strength than an identical control mix ...

 · Compressive Strength and Thermal Conductivity of Fly Ash Geopolymer Concrete Incorporated with Lightweight Aggregate, Expanded Clay Aggregate and ing Agent Abstract : This paper investigates the effect of incorporation of lightweight aggregate and in the preparation of lightweight aggregate geopolymer concrete (LWAGC) and lightweight aggregate ed geopolymer .

Key words: fly ash; cement concrete; compressive strength. 1 Faculty of Civil Engineering and Building Services, Technical University Gh. Asachi Iasi. 1. Introduction . During the last decades a lot of studies had shown that different types of additions used in the concrete mix can improve some of their characteristics [15]. In the producing high strength concrete there is necessary to ...

Compressive Strength of Concrete in all replacement. Fig. 5. Preparing mix of M20 concrete. Fig. 6. Tamping in Concrete. 0 5 10 15 20 25 30 35 7 Days 28 Days Compressive Strength MPa Age (Days) Normal Concrete Cube 10% Fly Ash 20% Fly Ash` 30% Fly Ash3. Bansal,Singh and Pareek 6 Fig. 7. Compaction of Concrete. Fig. 8. Casted Cubes. VI. CONCLUSION The result obtained from .

concluded that compressive strength of concrete is enhanced when admixtures like Sugar molasses added into the concrete composition. Key words: Rice Husk Ash, Concrete, OPC, Sugar molasses, Compressive Strength, Admixture 1. I. TimeINTRODUCTION min To fulfill the increasing demand and consumption of cement in today's scenario, many researchers and scientist from all around the world .

The result obtained showed that compressive strength of the concrete increased with increase in length of curing age, but decreased as the percentage of CPA increases. However, the strength still remained in the allowable range of workability for concrete in line with the British standard. CPA replacement of 5 15 percentages was found to be suitable considering the strength and safe use of ...

Cement in concrete mix design is replaced by fly ash as 0%, 10% 20% 30%,40% 50% and maximum strength in 30% for replacement of cement. It is stimulated that replacement of cement in any proportions earlier higher the compressive strength of concrete and later lower the compressive strength as well as slow its hardening. And also increase the ...

compressive strength were %, %, %,and % respectively. The results of the study indie that both the density and compressive strength of concrete decreased as the percentage replacement increased but replacement of sand by sawdust produced a higher percentage reduction in compressive strength than in density. Sawdust can ...

For further experiment, the compressive strength of concrete with the proportion from % until % was determined. The result shown the mix with % WPSAA was classified as appropriate percentage to generate better compressive strength with low cost production.

compressive strength of sawdust ashcement concrete can be predicted from known mix proportions and vice versa. Index Terms sawdust, optimization, scheffes, concrete, prediction, compressive strength I. In this work, a mathematical model for the prediction and INTRODUCTION ne of the basic needs of man is housing. In any developing

Table strength ofFly Ash concrete comp A comparison of compressive strength of concrete with Fly ash replacement by 0, 20, 30 and 40% is made for different curing periods reactive pozzolans which delays the hydration vide It is observed that the compressive strength is increased from 7days to 91days at 0% replacement. At 20, 30 and 40% replacement the .

for a compressive strength at a duration of 28 days, 56 days, and 90 days. High volume fly ash added with green concrete was having higher strength and durability as compare to normal concrete. 2. Experimental Study on Green Concrete[20]. Addition of micro silica in cement reduces the air pollution. The optimum replacement of

This study is aimed to investigate effect of fly ash on compressive strength, free expansion and shrinkage of expansive concrete. High CaO and low CaO fly ashes are used in this study. The replacement percentages of total binders by fly ash are 0 and 30% by weight. The replacements of expansive additive are 0, 20 and 30 kg/m3 of concrete. The test results revealed that the use of fly .

 · compressive strength of concrete with fly ash replacement percentages up to 30 %. Strength of concrete with different types of cement (CEM I, CEM I, CEM III ), after 2, 28, 90, 180 days of curing, have been analysed to evaluate the effect of addition content, the time of curing and the type of cement on the compressive strength changes. The adequacy of equations obtained .

COMPRESSIVE STRENGTH OF FLY ASH BLENDED CEMENTS Tunç, Hasan, Department of Civil Engineering Supervisor: Prof. Dr. İsmail ÖzgürYaman CoSupervisor: Prof. Dr. Mustafa Tokyay June 2014, 54 pages In Turkey the compressive strength of cements are determined according to TS EN 1961. That standard suggests the use of a constant water ...