Fly ash-based geopolymer concrete: study of slender reinforced columns

Sumajouw, D. M. J.; Hardjito, Djwantoro; Wallah, Steenie E.; Rangan, B. Vijaya

doi:10.1007/s10853-006-0523-8

Cited by 340 publications

(180 citation statements)

References 3 publications

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“…The rising of curing temperature even increases the split tensile strength for concrete with GGBFS (Ground Granulated Blas Furnace Slag) as substitution [12]. The highest influence ratio of Na 2 SiO 3 /NaOH on split tensile strength was achieved on the ratio 2.5, similar to the results of previous study [13]. Normal Curing Curing 40°C Curing 60°C Curing 80°C…”

Section: Split Tensile Strengthsupporting

confidence: 86%

The Effect of Temperature Curing on Geopolymer Concrete

Ekaputri¹,

Priyanka²

2017

MATEC Web Conf.

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.This study presents curing temperature influences to behaviors of geopolymer concrete. The concrete was fly ash based, with the ratio of fly ash to alkaline activator was 65%:35%. Ratio coarse aggregate to fine aggregate was 60%:40%, ratios Na 2 SiO 3 /NaOH were 1.5:2 and 2.5. A polycarboxilate superplasticizer with ratio was 2% to fly ash weight. Form of the test specimens were cylinder with diameter of 10 cm and 20 cm high. Steam curing conducted were at 40ᴼC, 60ᴼC and 80ᴼC for 24 hours. The control specimens were treated at normal moist curing. Tests conducted were compressive strength, tensile strength, porosity and elasticity modulus. The results indicated that at the elevated temperature the compressive strength increases as well as tensile strength but decreases the closed porosity of specimens. The elasticity modulus had a similar tendency.

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Section: Split Tensile Strengthsupporting

confidence: 86%

The Effect of Temperature Curing on Geopolymer Concrete

Ekaputri¹,

Priyanka²

2017

MATEC Web Conf.

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“…A number of studies have shown that geopolymer concrete has properties making it suitable as a construction material [2][3][4][5]. On the other hand, aside from being innately corrosion resistant, FRP bars are lightweight, electromechanically neutral, and fatigue-and chemical-resistant, as well as having high tensile-strength properties [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the flexural strength and serviceability of geopolymer concrete beams reinforced with glass-fibre-reinforced polymer (GFRP) bars

Maranan

Manalo

Benmokrane

et al. 2015

Engineering Structures

134

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Geopolymer concrete reinforced with glass-fibre-reinforced polymer (GFRP) bars can provide a construction system with high durability, high sustainability, and adequate strength. Few studies deal with the combined use of these materials, and this has been the key motivation of this undertaking. In this study, the flexural strength and serviceability performance of the geopolymer concrete beams reinforced with GFRP bars were evaluated under a four-point static bending test. The parameters investigated were nominal bar diameter, reinforcement ratio, and anchorage system. Based on the experimental results, the bar diameter had no significant effect on the flexural performance of the beams. Generally, the serviceability performance of a beam is enhanced when the reinforcement ratio increases. The mechanical interlock and friction forces provided by the sand coating was adequate to secure an effective bond between the GFRP bars and the geopolymer concrete. Generally, the ACI 4401.R-06 and CSA S806-12 prediction equations underestimate the beam strength. The bending-moment capacity of the tested beams was higher than that of FRP-reinforced concrete beams from the previous studies.2

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“…The water permeability coefficient of pervious geopolymer concrete was tested by using the constant head method and carried out when a steady state flow was reached [18,19]. The coefficients of water permeability (k) were the three specimen averages, and they were calculated by following Darcy's law as shown in the following Equation (1).…”

Section: Water Permeabilitymentioning

confidence: 99%

“…Concrete production fulfills the global demand of over 1.5 billion tons annually. The production of Portland cement releases a significant volume of carbon dioxide (CO 2 ) to the atmosphere, and it is also energy intensive [1,2]. For each ton of synthetic Portland cement, one ton of CO 2 is estimated to be emitted into the environment.…”

Section: Introductionmentioning

confidence: 99%

Optimum Mix for Pervious Geopolymer Concrete (GEOCRETE) Based on Water Permeability and Compressive Strength

et al. 2017

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Abstract. The production of ordinary Portland cement (OPC) consumes considerable natural resources and energy, and it also affects the emission of a significant quantity of CO 2 in the atmosphere. This pervious geopolymer concrete study aims to explore an alternative binder without OPC. Pervious geopolymer concretes were prepared from fly ash (FA), sodium silicate (NaSiO 3 ), sodium hydroxide (NaOH) solution, and coarse aggregate (CA). The effects of pervious geopolymer concrete parameters that affect water permeability and compressive strength are evaluated. The FA to CA ratios of 1:6, 1:7,1:8, and 1:9 by weight, CA sizes of 5-10, 10-14, and 14-20 mm, constant NaSiO 3 /NaOH ratio of 2.5, alkaline liquid to fly ash (AL/FA) ratios of 0.4, 0.5, and 0.6, and NaOH concentrations of 8, 10, and 12 M were the pervious geopolymer concrete mix proportions. The curing temperature of 80 °C for 24 h was used. The results showed that a pervious geopolymer concrete with CA of 10 mm achieved water permeability of 2.3 cm/s and compressive strength of 20 MPa with AL/FA ratio of 0.5, NaOH concentration of 10 M, and FA:CA of 1:7. GEOCRETE is indicated to have better engineering properties than does pervious concrete that is made of ordinary Portland cement.

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Fly ash-based geopolymer concrete: study of slender reinforced columns

Cited by 340 publications

References 3 publications

The Effect of Temperature Curing on Geopolymer Concrete

The Effect of Temperature Curing on Geopolymer Concrete

Evaluation of the flexural strength and serviceability of geopolymer concrete beams reinforced with glass-fibre-reinforced polymer (GFRP) bars

Optimum Mix for Pervious Geopolymer Concrete (GEOCRETE) Based on Water Permeability and Compressive Strength

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