Effect of gypsum type on properties of cementitious materials containing high range water reducing admixture

Mardani‐Aghabaglou, Ali; Boyacı, Onur Can; Hosseinnezhad, Hojjat; Felekoğlu, Burak; Ramyar, Kambiz

doi:10.1016/j.cemconcomp.2016.02.007

Cited by 46 publications

(13 citation statements)

References 23 publications

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“…It is known that anhydrite dissolves very slowly in water, which affects the formation of ettringite and consequently, the resistance evolution, particularly at a very early age [3,4]. According to Agabgbou et al, [5], mechanical properties of cement pastes and mortars were more affected when hemihydrate is used, especially, in terms of dimensional variations where a greater drying shrinkage was found. In the field of cement industry, term of gypsum refers generally to calcium sulfate dihydrate (CaSO 4 Á2H 2 O).…”

Section: Introductionmentioning

confidence: 99%

Optimization of the SO3 content of an Algerian Portland cement: Study on the effect of various amounts of gypsum on cement properties

Siline

Omary

2018

Construction and Building Materials

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h i g h l i g h t s Gypsum is a cement setting regulator, it is also a cement hydration accelerator. The use of gypsum at the optimum content, improves several cement properties. Its use below or above the optimum, affects adversely the cement properties. The optimum gypsum content is not fixed at 5%, it varies from a cement to another. The optimum gypsum content depends mainly on: SO 3 %, C 3 A %, Alkali % and cement SSB.

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Section: Introductionmentioning

confidence: 99%

Optimization of the SO3 content of an Algerian Portland cement: Study on the effect of various amounts of gypsum on cement properties

Siline

Omary

2018

Construction and Building Materials

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“…Considering mini-slump values of paste mixtures, mini slump values of the mixtures reduced with the use of water reducing admixture independently from mineral admixture use. That is resulted from the decrease of critical shear stress values of the mixtures with the use of water reducing admixture [22]. Nonetheless, flow values of the mixtures performed no change over a certain amount of admixture use.…”

Section: Test Results Of Paste Mixturesmentioning

confidence: 99%

Effect of Utilization of Different Type of Mineral Admixture On Fresh And Hardened Properties of Cementitious Systems

Mardani‐Aghabaglou¹,

Nematzadeh²,

Geven³

2019

Sakarya University Journal of Science

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In this study, the effect of mineral admixture utilization on fresh and some hardened state properties of cement paste and mortar mixtures were investigated. For this purpose, in addition to the control mixture containing no mineral admixture, three more series of mixtures were prepared. In the first and second mixtures 30% and 10 w.t% of cement was replaced with silica fume and fly ash respectively. In the third series, cement was replaced with both of silica fume and fly ash by 30% and 10%, respectively. According to test results, fresh state properties of paste mixtures were affected by mineral admixture use positively in general. However, a reverse result was observed for the fresh state properties of mortar mixtures. Compressive strength values of the mixtures including fly ash as well as the ones including silica fume and fly ash was found to be less than that of control mixture. Nevertheless, the difference between those values reduced at the end of 90 days. Mixture including silica fume showed the highest strength value from the beginning. 90-day water absorption values of the mortar mixtures were observed to be less compared to that of control mixtures with the use of mineral admixture. The mixture having ternary binder system (including cement, silica fume and fly ash) showed better performance in terms of hardened properties. The water absorption capacity value of mentioned mixture was observed as 42% less than that of control mixture.

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“…For Mardani-Aghbaghou, et al, the chemical admixture needs to be chosen on the basis of the type of sulfates present in cement, i.e. anhydrite or gypsum, because of the difference in their reactivity in the 8 presence of superplasticizers [61]. Moreover, the standard EN 934-2 states that a chemical admixture can only be used in concrete if the SO 3 content is lower than 2% [62].…”

Section: Current State Of Knowledgementioning

confidence: 99%

Optimization of concrete mix design to account for strength and hydration heat in massive concrete structures

Bourchy¹,

Barnes²,

Bessette³

et al. 2019

Cement and Concrete Composites

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In the case of massive concrete structures, the heat generated by cement hydration may cause cracking due to thermal strains. The mix design of the concrete used for such structures has to take account of mechanical properties and generated temperatures. Using experimental design principles, the hydration heat and the development of compressive strength are measured in order to determine how the composition of concrete and the presence of SCM influence the characteristics of concrete and to create a mix design protocol. This protocol can help to determine which mix design minimizes the hydration temperature for a given compressive strength.

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Effect of gypsum type on properties of cementitious materials containing high range water reducing admixture

Cited by 46 publications

References 23 publications

Optimization of the SO3 content of an Algerian Portland cement: Study on the effect of various amounts of gypsum on cement properties

Optimization of the SO3 content of an Algerian Portland cement: Study on the effect of various amounts of gypsum on cement properties

Effect of Utilization of Different Type of Mineral Admixture On Fresh And Hardened Properties of Cementitious Systems

Optimization of concrete mix design to account for strength and hydration heat in massive concrete structures

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