scholarly journals Acid Resistance and Curing Properties for Green Fly Ash-geopolymer Concrete

2013 ◽  
Vol 12 (2) ◽  
pp. 317-322 ◽  
Author(s):  
Khoa Tan Nguyen ◽  
Young Hak Lee ◽  
Jaehong Lee ◽  
Namshik Ahn
Keyword(s):  
Fly Ash ◽  
Acid Resistance ◽  
Geopolymer Concrete

scholarly journals A Brief Review of Fly-ash Based Geopolymer Concrete

2021 ◽  
pp. 230-237
Author(s):  
Vaibhavi G Galande ◽  
Harshavardhan U Kamble
Keyword(s):  
Fly Ash ◽  
Thermal Power ◽  
Acid Resistance ◽  
Potassium Thiocyanate ◽  
Sodium Thiocyanate ◽  
Geopolymer Concrete ◽  
Conventional Concrete ◽  
Concrete Material ◽  
Concrete Mix Design ◽  
Test Result

Geopolymer concrete can be the future of the conventional concrete and it can be used as replacement agent instead of conventional concrete in construction work along with that the GPC is eco friendly in nature as it does not emits CO2 in atmosphere so it is helpful to reduce the Greenhouse effect. The material used for the manufacturing of GPC are Binder’s and Actuators. Birder’s are obtained from the thermal power plant also known as fly ash and actuator consist of the sodium silicate and sodium hydroxide, calcium chloride, sodium thiocyanate, potassium thiocyanate, etc. By combing these acceleration and Binder’s with other concrete material the process of Geopolymeration starts. The objective of these study is to give a detailed review on the geopolymer concrete mix design, compressive behavior, flexural and split tensile behavior and chemical acid resistance when immersed in sopheric acid and nitric acid by using various research paper and the test result difference of conventional concrete and geopolymer concrete. Based on that a review is prepared.

scholarly journals Durability Performance Evaluation of Rubberized Geopolymer Concrete

2021 ◽  
Vol 13 (11) ◽  
pp. 5969
Author(s):  
Salmabanu Luhar ◽  
Ismail Luhar ◽  
Demetris Nicolaides ◽  
Rajesh Gupta
Keyword(s):  
Performance Evaluation ◽  
Fly Ash ◽  
Acid Resistance ◽  
Drying Shrinkage ◽  
Salt Resistance ◽  
Raw Material ◽  
Chloride Diffusion ◽  
Geopolymer Concrete ◽  
Promising Alternative ◽  
Operational Energy

Unfortunately, the production of cement impacts pessimistically on environments since it emits CO2—a principal Green House Gas (GHG)—encouraging the earth-heating dilemma. Moreover, it necessitates not only high temperature produced by the devouring of narrow natural mineral coal resources to obtain very high amounts of energy, but it also gulps down natural limestone deposits as a raw material that is found confined in nature to obtain intense energy. Quite recently, geopolymerisation—an exothermic process, through which geopolymeric binders can be produced by synthesis of a pozzolanic precursor rich in Alumina and Silica, for an instant, Fly Ash, with alkali solution for activation in an alkali medium at a low temperature and low operational energy—is recognized as a brilliantly promising alternative to conventional cement. That means, no elevated temperature and higher energy consuming reactions are essential any more as found associated with contemporary cement production. This research paper moves towards fulfilling the performance evaluation of durability studies viz., water permeability, sorptivity, sulphate resistance, acid resistance, salt resistance, chloride diffusion, drying shrinkage, and corrosion of fly ash based user and eco-friendly rubberized (containing rubber tyre fibres) geopolymer concrete. Comparisons of the outcomes have been made with its counterpart, which has unearthed that Rubberized Geopolymer Concrete proved to better concerning all the above-mentioned parameters than Rubberized OPC-Concrete.

Properties of Fly Ash Based Geopolymer Concrete Exposed to Sustained Elevated Temperatures

2011 ◽  
Vol 250-253 ◽  
pp. 962-968 ◽  
Author(s):  
M.S. Sudarshan ◽  
R.V. Ranganath
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Elevated Temperature ◽  
Fly Ash ◽  
Elevated Temperatures ◽  
Research Work ◽  
Acid Resistance ◽  
Geopolymer Concrete ◽  
Cement Concrete ◽  
Beneficial Effects

Fly ash based geopolymer concrete is gaining importance in the context of developing alternatives to cement concrete. The research work available in the literature shows many beneficial effects of the material in terms of its high early compressive strength, tensile strength, reduced shrinkage, good acid resistance etc., However, there are very few studies carried out on the influence of sustained elevated temperature on the properties of geopolymer concrete. This paper presents the results of some of the properties of fly ash based geopolymer concrete activated using sodium silicate and sodium hydroxide and subjected to elevated temperature at 150°C, 200°C, 300°C, 400ºc under sustained durations of 1 hour, 2 hours and 4 hours. The results show that residual compressive strength is about 20% less than the normal at about 200°C itself possibly due to the development of vapour pressure formed by the non-reactive water present in the system. Beyond 2 hours of sustenance, there is not much of a difference in the properties of concrete.

THE EFFECT OF FLY ASH IN GEOPOLYMER CONCRETE POLES – A THRIVING SOLID WASTE DISPOSAL MEASURE FOR ECO-FRIENDLY ENVIRONMENT

2018 ◽  
Vol 8 (2) ◽  
pp. 7
Author(s):  
R. THENMOZHI ◽  
VADIVEL T.SENTHIL ◽  
S. MUTHURAMALINGAM ◽  
V. PADMAPRIYA ◽  
◽  
...  
Keyword(s):  
Fly Ash ◽  
Solid Waste ◽  
Waste Disposal ◽  
Geopolymer Concrete ◽  
Solid Waste Disposal

scholarly journals Practical Prediction Models of Tensile Strength and Reinforcement-Concrete Bond Strength of Low-Calcium Fly Ash Geopolymer Concrete

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 875
Author(s):  
Chenchen Luan ◽  
Qingyuan Wang ◽  
Fuhua Yang ◽  
Kuanyu Zhang ◽  
Nodir Utashev ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Fly Ash ◽  
Bond Strength ◽  
Prediction Models ◽  
Splitting Tensile Strength ◽  
Geopolymer Concrete ◽  
Structural Factors ◽  
Test Results ◽  
Portland Cement Concrete ◽  
Low Calcium

There have been a few attempts to develop prediction models of splitting tensile strength and reinforcement-concrete bond strength of FAGC (low-calcium fly ash geopolymer concrete), however, no model can be used as a design equation. Therefore, this paper aimed to provide practical prediction models. Using 115 test results for splitting tensile strength and 147 test results for bond strength from experiments and previous literature, considering the effect of size and shape on strength and structural factors on bond strength, this paper developed and verified updated prediction models and the 90% prediction intervals by regression analysis. The models can be used as design equations and applied for estimating the cracking behaviors and calculating the design anchorage length of reinforced FAGC beams. The strength models of PCC (Portland cement concrete) overestimate the splitting tensile strength and reinforcement-concrete bond strength of FAGC, so PCC’s models are not recommended as the design equations.

Influence of red mud on performance enhancement of fly ash-based geopolymer concrete

2021 ◽  
Vol 6 (4) ◽  
Author(s):  
Ramamohana Reddy Bellum ◽  
Chava Venkatesh ◽  
Sri Rama Chand Madduru
Keyword(s):  
Fly Ash ◽  
Red Mud ◽  
Performance Enhancement ◽  
Geopolymer Concrete
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