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Properties Of Concrete

Geopolymer mortar refers to the mortar manufactured with sand and geopolymer, which is composed by the base materials containing affluent aluminium and silicon that was activated by adopting alkaline solution to serve as a binder. The investigation of the properties and application of the geopolymer mortar has attracted more and more attention of the researchers and cement based industries because of its sustainability advantages. This study reviews the properties of the geopolymer mortars including fresh performance (workability, setting time, and temperature of fresh mortar), physical properties, mechanical properties (compressive strength, tensile strength, elastic properties, flexural performance, bonding behavior, and fracture behavior), durability properties (acid resistance, resistance to elevated temperature, frost resistance, water absorption, and shrinkage properties) and microstructure analysis. This study also reviews the properties of different types of geopolymer mortars prepared using various source materials as base materials. The current study results indicate that the geopolymer mortar has exhibited significant feasibility and application prospect to be used as an environmental friendly building material, which may be an appropriate replacement to the traditional cement mortar in the future.

A review on properties of fresh and hardened geopolymer mortar

Drying shrinkage in alkali-activated binders – A critical review

A critical review of geopolymer properties for structural fire-resistance applications

Incorporation of nano-materials in cement composite and geopolymer based paste and mortar – A review

Very high strength (120 MPa) class F fly ash geopolymer mortar activated at different NaOH amount, heat curing temperature and heat curing duration

Optimization of heat cured fly ash/slag blend geopolymer mortars designed by “Combined Design” method: Part 1

In order to reduce heating costs in winter and cooling costs in summer, buildings are thermally insulated. In Turkey, large amounts of sunflower and wheat are produced every year. After production, sunflower and wheat stalks , create a serious storage problem. When these waste materials are used in houses for heating purposes, they cause environmental pollution. On the other hand, a large amount of vermiculite mineral is obtained during the natural wear of mica in Malatya and Sivas mines in Turkey. This mineral is capable to expand at high temperatures. A new insulation material produced by using vermiculite, sunflower stalk, wheat stalk and gypsum was investigated in this study as an alternative to non-renewable plastic-based synthetic insulation materials. The physical, mechanical and engineering properties of the samples were determined and the values were compared with the products on the market. The proposed compressed insulation material including vermiculite, sunflower stalk, wheat stalk and gypsum has a great potential as an insulating construction material with a thermal conductivity coefficient of 0.063–0.334 W/mK, a compressive strength of about 0.363 MPa and a density of 0.166–0.302 g/cm3.

The possibility of vermiculite, sunflower stalk and wheat stalk using for thermal insulation material production

This study presents the strength properties of alkali activated Ground Granulated Blast Furnace Slag (GGBFS) /Fly Ash (FA) blend mortars prepared with sodium meta-silicate and, sodium hydroxide-silica fume combination mixture. The GGBFS/FA ratios were arranged at (100/0, 80/20, 60/40, 40/60, 20/80, 0/100). Water to “GGBFS+FA” ratio was kept constant at 0.5. Na concentration ratio to “GGBFS+FA” was kept constant at 6%. These ratios were in mass basis. Three different mixture parameters were used. In the first series of mixture, only sodium meta-silicate was used as activator. In second and third series, sodium hydroxide and silica fume combination was used as activator. Sodium hydroxide and silica fume was mixed with water and used directly in preparation of second series of mortar mixtures. For preparation of third series of mortar mixture, sodium hydroxide and silica fume were mixed continuously with water for three days to allow dissolution of silica fume in sodium hydroxide solution. At first, 3-days compressive strengths of all alkali activated mortar mixture were measured. After that due to the very low compressive strength of mortars made with high volume fly ash content, only 100/0 and 80/20 slag/fly ash ratios were investigated for 7, 14 and 28 days compressive and 28 days flexural strength. The results of the 3 days tests show that decreasing the slag/fly ash ratio decreases distinguishably the compressive strength of the mortars. The mortars produced with the mixture of sodium hydroxide and silica fume combination as activator showed satisfactory results when compared with those activated with sodium meta-silicate.

/pdf/strength-properties-of-slag-fly-ash-blends-activated-with-m24vgtwoq0.pdf

Strength Properties of Slag/Fly Ash Blends Activated with Sodium Metasilicate and Sodium Hydroxide+Silica Fume

/pdf/strength-properties-of-slag-fly-ash-blends-activated-with-4l2regw34p.pdf

Erion Luga

Papers

Very high strength (120 MPa) class F fly ash geopolymer mortar activated at different NaOH amount, heat curing temperature and heat curing duration

Optimization of heat cured fly ash/slag blend geopolymer mortars designed by “Combined Design” method: Part 1

The possibility of vermiculite, sunflower stalk and wheat stalk using for thermal insulation material production

Strength Properties of Slag/Fly Ash Blends Activated with Sodium Metasilicate and Sodium Hydroxide+Silica Fume

Strength properties of slag/fly ash blends activated with sodium metasilicate