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(iii) It was observed with replacement of 20% fly ash concrete compressive strength was increased by 7% and 11% as compared to normal concrete cubes. (iv) It was seen that with 30% of fly ash 23% and 25% increase compressive strength at 7 and 28 days period of curing.
Syed Afzal Basha [2014][7] :- In this paper Compressive Strength of Fly Ash Based Cement Concrete an attempt is made for assessment of compressive strength of Fly ash cement concrete. Concrete mixes M25, M30, are designed as per the Indian standard code (IS-10262-82) by adding, 0%, 10%, 20%, 30% and 40% of fly ash.
beyond 1.5%, compressive strength decreases. Reddy, Meena, & et. all (2018), Use of nanosilica gives stronger concrete with minimum pores.M30 concrete has been tested. Fly ash, nanosilica concrete sets quickly than that of conventional concrete. They are superior to conventional concrete. Addition of replacement materials
Table 7: Compressive strength of prism 1:6 fly ash concrete bricks in C/ M mixed with recron fiber I/D Size load area Strength Avg. Compressive Strength Cm2 tonnes Cm2 Kg/Cm2 % Change C60 23 X 23 21.0 529.0 39.7 39.5 zero C60 23 X 23 20.8 529.0 39.3 C60.5 23 X 23 22.9 529.0 43.3 42.8 8.36 C60.5 23 X 23 22.4 529.0 42.3
The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction. The invention includes a method for predicting the compressive strength of such a hardenable mixture, which is very important for planning a project. The invention also relates to hardenable mixtures comprising cement and fly ash which can achieve greater
compressive strength showed a decrease with increasing cowdung ash content and an increase with curing age. There was no significant difference in compressive strength between the control concrete and those containing up to 15% Cowdung ash at 5% level of significance. A regression model showing the relationship between compressive strength
bamboo leaf ash (BLA); namely, 10%, 15%, 20%, 25% and 30%. The specimens were tested at the ages of 7 days and 28 days so as to observe a trend in change in compressive strength to study the effect of age of concrete. Pozzolanic Activity Index Pozzolanic activity of BLA has been studied by testing the strength activity index with Portland cement
replacement (0% to 70%) of cement by fly ash in concrete on its compressive strength. He reported that high volume fly ash concrete has decreased compressive strength at 28 days, better strength at later ages i.e. 5 and 120 days, increased brittleness index and better resistance to …
Compressive Strength of Concrete using Fly Ash and Rice Husk Ash: A Review. Civil Engineering Journal, 2020. Joel Sam. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 1 Full PDF related to this paper. READ PAPER. Compressive Strength of Concrete using Fly Ash and Rice Husk Ash: A Review. Download. Compressive
workable as well as lower compressive strength. A new methodology needs to be developed which will address these issues of low workability and poor compressive strength. 2. Objectives of study . This paper discussed the results of an investigation of compressive strength carried out on . unprocessed and processed fly ash based geopolymer concrete.
compressive strength of concrete mixes made with various % of Washed Bottom Ash as fine aggregate replacement. The compressive strength of control sample (fully natural sand) was determined at 3, 7, 28, and 60 days of curing. It was seen that the compressive strength of concrete mixes of sand replacement is much lower than control sample at
Feb 08, 2021· Javed et al. [22] predict the compressive strength of sug-arcane bagasse ash (SCBA) concrete using gene expression programming (GEP). The author used the experimental test for calibration and validation of the model. Similarly, Aslam et al. [23] predict the compressive strength of high-strength concrete (HSC) by employing GEP.
4. I-Cheng Yeh, "Prediction of Strength of Fly Ash and Slag Concrete By The Use of Artificial Neural Networks," Journal of the Chinese Institute of Civil and Hydraulic Engineering, Vol. 15, No. 4, pp. 659-663 (2003). 5.
compressive strength does not vary with the age of concrete. This observation is in contrast to the well-known behaviour of OPC concrete, which undergoes hydration process and hence gains strength over the time. 0 10 20 30 40 50 60 70 80 0 20 40 60 80 100 Age (days) Compressive strength (MPa) Figure 1. Compressive Strength at Different Ages 0
Compressive strength is a crucial design index of fly ash blended concrete. This study presents an estimation model to show the effect of fly ash on the strength development of concrete. First, a neural network model is proposed to estimate the compressive strength of fly ash blended concrete. The input variables of the neural network are water-to-binder ratio, fly ash replacement ratio, and
Fig 5:Average compressive strength of fly ash concrete in N/mm2v/s percentage replacement after 28 days of curing The above tables and graph represents the variation of compressive strength of concrete with different percentages of glass fibre reinforcement and percentage replacement of cement with fly ash.
Apr 30, 2019· Wherein, for the test pieces on 28d, the flexural strength decreased more dramatically than the compressive strength, for example, when the straw ash proportion was 5 %, compared with the standard test piece of 28d, the flexural strength decreased by 28 %, and the compressive strength decreased by 11 %; when the straw ash proportion was 10 %
Jan 01, 2001· The compressive strength of paste mixtures containing fly ash is plotted as a function of time in Fig. 2.Although the a/c ratio of these mixtures varies from 1 to 3, the water/binder ratio was kept constant at approximately 0.3 and the strength development of the paste mixture with the same w/c ratio but containing no ash is shown for comparison.
Compressive strength is the parameter that represents the concrete in the structural design. Mainly, there are two materials such as concrete and steel in the mix. Therefore, knowing the compressive strength is uttermost important for the designer. Factors affecting the Compressive strength of concrete. There are many factors that affect the
Dec 01, 2005· compressive strength of concrete with fly ash replacement percentages up to 30 %. Strength of concrete with dif- ferent types of cement (CEM I 42.5, CEM I 32.5, CEM III 32.5), after 2, 28, 90, 180 days of curing, have been
of meta-kaolin and hot curing regime will improve the compressive strength of meta-kaolin based geo-polymer concrete. Also, increasing the alkaline liquid ratio, morality of NaOH solution, and content of fly ash will improve the compressive strength of fly ash based geopolymer concrete.
The cube 'K 'with a fiber percentage of 1.25% and 6% fly ash showed ultimate strength of 37.67 N/mm 2, which is about 37% more than 'A1' and 33% more than 'A2.'The compressive strength of cubes reduced, when volume fraction of the fibers used was 1.5% and fly ash …
concrete with 28 days strength ranging from 40 to 60 Mpa and with adequate durability can be produced with cost saving of 16% by 50% replacement level. Gopalakrishnan et al. (2000) reported from their work that the 7 day compressive strength of concrete mixes, having fly ash as cement
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
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. Concrete mixes M25, M30, are designed as per the Indian standard code (IS-10262-82) by adding, 0%, 10%, 20%, 30%
Fly Ash Content and Compressive Strength .. 27 4.3.1.3. Compressive Strength Results properties of concrete. Compressive strength often increases as cement content increases. While this may seem positive, past research has shown links between increased concrete strength and
The data on the compressive strength of concrete after fly ash and rice husk ash had been added in percentage increments of 0%, 10%, 20%, 30%, 40%, 50% and 0%, 5%, 7.5%, 10%, 12.5%, 15% respectively analysed over a minimum period of 7 days and a maximum period of 28 days found out that the optimal percentage partial replacement of fly ash and
Oct 19, 2020· Concrete is a material with high strength in compression, but low strength in tension. That is why engineers use reinforced concrete (usually with steel rebars) to build structures. Content. Given are the variable name, variable type, the measurement unit, and a brief description. The concrete compressive strength is the regression problem.
3.1.1. Strength of concrete with a w/b ratio of 0.5 One-day compressive strength at a w/b ratio of 0.5 for each of the concrete mixes is summarised in Fig.1. Fig.1. 1-day compressive strength; w/b. Each data set is the average of three test results. Concrete with WSA-GGBS mix compositions 30:70, 50:50 and 60:40 show almost identical one-day
Effects of Nano Silica, Micro Silica, Fly Ash and Bottom Ash on Compressive Strength of Concrete 1149 Table 5 Strength of concrete with micro silica. Compressive strength (MPa) 7 days 28 days 60 days 90 days C1 (OPC) 46.3 57.7 59.3 62.1 C2 (OPC + 1%mS) 48.7 57.4 60.2 61.7 C3 (OPC + 3%mS) 50.1 62.2 63.0 63.9 micro silica.
Sep 12, 2017· Here 36 cubes were prepared for test , fly ash is added in place of cement in concrete in 5 different mode ranging from 0% to 50% at an interval of 10% and the maximum strength …
Syed Afzal Basha [2014][7] :- In this paper Compressive Strength of Fly Ash Based Cement Concrete an attempt is made for assessment of compressive strength of Fly ash cement concrete. Concrete mixes M25, M30, are designed as per the Indian standard code (IS-10262-82) by adding, 0%, 10%, 20%, 30% and 40% of fly ash.
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.
3.1 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