scholarly journals Proposed simplified method of geopolymer concrete mix design

2020 ◽  
Vol 21 ◽  
pp. 31-37
Author(s):  
Ali Abdulhasan Khalaf ◽  
Katalin Kopecskó
Keyword(s):  
Controlling Factors ◽  
Mix Design ◽  
Alkali Activation ◽  
Geopolymer Concrete ◽  
Molar Ratios ◽  
Concrete Mix Design ◽  
Mix Proportion ◽  
Absolute Volume ◽  
Optimal Mix ◽  
Volume Method

The research aims to determine the best combination of the controlling factors that govern geopolymer concrete’s mechanical and physical properties by utilizing industrial waste. Therefore, a review on the controlling factors was conducted. Firstly, it is to identify the controlling factors, namely chemical composition, alkali activation solution, water content, and curing condition. Secondly, understanding the relationship between these controlling factors and the properties of geopolymer concrete. These factors are analysed to the mix proportion components. Finally, a new proportion method is proposed based on combining ACI 211 standard and recommended molar ratios of oxides involved in geopolymer synthesis. The effect of aggregate has been taken into account by applying the absolute volume method in mix design. Based on the results of the study, it is expected to determine the optimal mix proportions based on multi-responses.

Mix Design of Compaction-Free Porous Concrete Permeable Base

2011 ◽  
Vol 368-373 ◽  
pp. 1416-1419 ◽  
Author(s):  
Yan Ping Sheng ◽  
Hai Bin Li ◽  
Bo Wen Guan
Keyword(s):  
Performance Test ◽  
Design Method ◽  
Mix Design ◽  
Construction Technology ◽  
Porous Concrete ◽  
The Road ◽  
Mix Proportion ◽  
Vibration Compaction ◽  
The Stability ◽  
Volume Method

Moisture damage is one of the main forms of early failure in the asphalt pavement. Setting porous concrete permeable base can release water from the road structure. The common construction technology for porous concrete is traditional vibration compaction, which is helpful for the strength formation of the base, but unhelpful for the stability and smoothness of the base.In this sdudy, Compaction-free Porous Concrete (CPC) permeable base was proposed, which can not only satisfies the strength requirement of structures, but also guarantees the stability and the smoothness of the base. The idea of volume method was adopted on mix design of CPC. Mix proportion parameters such as aggregate dosage, cement dosage and water dosage were calculated and confirmed based on experimental study. The performance test results show that CPC designed by this method can satisfy the design standard. Accordingly, the design method of CPC is feasible.

Development of Concrete Mix Design Nomograph Containing Polyethylene Terephtalate (PET) as Fine Aggregate

2013 ◽  
Vol 701 ◽  
pp. 12-16 ◽  
Author(s):  
Mohd Irwan Juki ◽  
Khairunnisa Muhamad ◽  
Mahamad Mohd Khairil Annas ◽  
Koh Heng Boon ◽  
Norzila Othman ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Splitting Tensile Strength ◽  
Mix Design ◽  
Fine Aggregate ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
Concrete Mix Design ◽  
Mix Proportion ◽  
Concrete Mix

This paper describes the experimental investigation to develop the concrete mix design Nomograph for concrete containing PET as fine aggregate. The physical and mechanical properties were determined by using mix proportion containing 25%, 50% and 75% of PET with water cement ratio (w/c) 0.45, 0.55 and 0.65. The data obtained showed that the inclusion of PET aggregate reduce the strength performances of concrete. All the data obtained were combined into one single graph to develop a preliminary mix design nomograph for PET concrete. The nomograph consist of ; relationship between compressive strength and water cement ratio; relationship between splitting tensile strength water cement ratio; relationship between splitting tensile strength and PET percentage and relationship between compressive strength and PET percentage. The mix design nomograph can be used to assists in selecting the proper mix proportion parameters based on the criteria required.

Optimum Autoclaved Cement Concrete Mix Design Based on Flexural Strength

2011 ◽  
Vol 189-193 ◽  
pp. 676-679 ◽  
Author(s):  
Chang Jun Ke ◽  
Qin Hu ◽  
Pan Jiang ◽  
Li Zhang
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Orthogonal Test ◽  
Mix Design ◽  
Cement Concrete ◽  
Plant Fiber ◽  
Concrete Mix Design ◽  
Strength Change ◽  
Mix Proportion ◽  
Mass Increase

optimized mix proportion of autoclaved cement concrete by orthogonal test, and studied effect of two type fibers for the flexural strength of autoclaved cement concrete by the mix proportion of autoclaved concrete. The results showed, wollastonite and plant fiber were favorable to increasing the flexural strength of autoclaved cement concrete. Content of wollastonite was about 15% of cement mass, and increase amplitude of the flexural strength was more than 40% and the compressive strength slightly increased for autoclaved cement concrete admixed wollastonite. Content of plant fiber was about 1.5% of cement mass, increase amplitude of the flexural strength was more than 20%, but compressive strength change of autoclaved cement concrete was not significant for autoclaved cement concrete admixed plant fiber.

scholarly journals Strength and Durability Performance of Alkali-Activated Rice Husk Ash Geopolymer Mortar

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Yun Yong Kim ◽  
Byung-Jae Lee ◽  
Velu Saraswathy ◽  
Seung-Jun Kwon
Keyword(s):  
Compressive Strength ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Polymerization Reaction ◽  
Strength Development ◽  
Geopolymer Concrete ◽  
Portland Cement Concrete ◽  
Mix Proportion ◽  
Strength And Durability ◽  
Alkali Activated

This paper describes the experimental investigation carried out to develop the geopolymer concrete based on alkali-activated rice husk ash (RHA) by sodium hydroxide with sodium silicate. Effect on method of curing and concentration of NaOH on compressive strength as well as the optimum mix proportion of geopolymer mortar was investigated. It is possible to achieve compressive strengths of 31 N/mm2and 45 N/mm2, respectively for the 10 M alkali-activated geopolymer mortar after 7 and 28 days of casting when cured for 24 hours at 60°C. Results indicated that the increase in curing period and concentration of alkali activator increased the compressive strength. Durability studies were carried out in acid and sulfate media such as H2SO4, HCl, Na2SO4, and MgSO4environments and found that geopolymer concrete showed very less weight loss when compared to steam-cured mortar specimens. In addition, fluorescent optical microscopy and X-ray diffraction (XRD) studies have shown the formation of new peaks and enhanced the polymerization reaction which is responsible for strength development and hence RHA has great potential as a substitute for ordinary Portland cement concrete.

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