Effect of using limestone fines on the chemical shrinkage of pastes and mortars

Khatib, Jamal; Ramadan, Rawan; Ghanem, Hassan; Elkordi, Adel

doi:10.1007/s11356-022-18496-5

Cited by 11 publications

(16 citation statements)

References 45 publications

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“…Thus, water absorption was higher in the LRA and LSR mortars than LSF mortar. The SEM images of all lime composite mortars exhibits a maximum density of the spherical microstructure at both 7 and 28 curing days, while the SEM images of lime mortar do not have any hydrate growth and only the thick white calcium carbonate granules were viewed [47][48][49][50][51][52][53][54]. As per EDX, lime has an increasing content of calcium from 7 to 28 days as a result of carbonation.…”

Section: Water Absorptionmentioning

confidence: 88%

“…Since carbonation is a slow process, the microstructure growth goes on developing at latter stages. Overall, the lime composite mortar exhibits the dense spherical hydrates (Type III -CSH) [14,18,[47][48][49][50][51][52][53][54]. There was no formation of acicular and hexagonal CSH morphologies found in the samples.…”

Section: Water Absorptionmentioning

confidence: 91%

“…It was observed that the lime mortar bar exhibits higher shrinkage than others. Carbonation of lime is initiated after the hardening of lime mortar leads to surface voids [44][45][46][47][48][49][50][51][52][53][54]. Lime composite mortar undergoes less shrinkage due to the formation of hydration products as a result of pozzolanic activity and hydration.…”

Section: Drying Shrinkagementioning

confidence: 99%

“…Hence, small pores are created in the surface of mortar after the evaporation of released water. At higher curing ages, RHA absorbs less water because of the complete utilisation of active silica and therefore the reduction of permeable voids in it [47][48][49][50][51][52][53][54]. At a saturated condition, water penetrated through these pores and filled up the voids.…”

Section: Water Absorptionmentioning

confidence: 99%

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Mechanical and Microstructural Properties of Composite Mortars with Lime, Silica Fume and Rice Husk Ash

Malathy¹,

Shanmugam²,

Chung

et al. 2022

Processes

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A mixture of hydraulic lime and pozzolanic material can be used as a binder in making concrete and mortar for energy-efficient construction purposes. Generally, lime possesses lower strength and higher setting time. By introducing pozzolans in the lime mortar, their cementitious properties could be increased and could compete with the cement mortars. The use of pozzolan-lime binder in mortar reduces the utilisation of cement, and hence reduces the environmental problem originating from cement production. This study mainly deals with the mechanical and microstructural properties of lime and lime composite mortars made up of hydraulic lime, silica fume and rice husk ash. Three composite mortars were made with the following combination such as hydraulic lime-silica fume (LSF), hydraulic lime-rice husk ash (LRA) and hydraulic lime-silica fume-rice husk ash (LSR). Further, their properties were compared with the pure lime mortar. Preliminary investigations were made on the lime reactivity and pozzolanic reactivity tests. It was understood that silica fumes have a (15%) better reactivity than rice husk ash. The introduction of pozzolans in the lime mortar promotes fresh, hardened and microstructural properties. The 28 days’ compressive strength of lime composite mortars achieved more than 16 Mpa, while the lime mortar attained 4 Mpa. The combined effect of pozzolanic reaction, hydration and carbonation in the lime composite mortars achieved four times the strength of lime mortar at 28 days. A high peak of calcium carbonate was detected in lime mortar as a result of carbonation. The well-developed microstructure of calcium silicate hydrate and calcium hydroxide exhibits the formation of hydration products in the lime composite mortars as observed from a scanning electron microscope (SEM), energy-dispersive X-ray (EDX) and X-ray diffraction (XRD). Similar graphs of Fourier transform infrared spectroscopy (FT-IR) showed the presence of equivalent functional elements in all lime composite mortars.

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Section: Water Absorptionmentioning

confidence: 88%

Section: Water Absorptionmentioning

confidence: 91%

Section: Drying Shrinkagementioning

confidence: 99%

Section: Water Absorptionmentioning

confidence: 99%

See 2 more Smart Citations

Mechanical and Microstructural Properties of Composite Mortars with Lime, Silica Fume and Rice Husk Ash

Malathy¹,

Shanmugam²,

Chung

et al. 2022

Processes

View full text Add to dashboard Cite

show abstract

“…A new correlation was developed by A. Meddah, M. Beddar, and A. Bali [71] for measuring the strength loss of concrete pavement due to the increase in the quantity of rubber content. Khatib, J., Ramadan, R., Ghanem, H., and Elkordi [72] concluded that the value of R 2 for the correlation between compressive strength and chemical shrinkage between cement paste and mortar at different curing ages was 0.75, which was found to be less than the R 2 value for correlation between compressive strength and UPV, which was 0.82. Khatib J., Ramadan R., Ghanem, H., and Elkordi A [73] concluded that a positive correlation existed between chemical shrinkage and both autogenous and drying shrinkage.…”

Section: Statistical Correlation Between Different Properties Of Conc...mentioning

confidence: 98%

An Investigation of Mechanical Properties of Fly Ash Based Geopolymer and Glass Fibers Concrete

et al. 2022

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This paper presents an innovative approach towards the development of a green concrete. The geopolymer is an environmentally friendly construction/repairing material. In addition, glass fibers are helpful to influence the strength properties and to reduce hair line cracks and bleeding in concrete. This study is based on the use of fly ash and glass fibers as a partial replacement of cement and, subsequently, its effect on compressive strength and split tensile strength of concrete. The geopolymer is manufactured after the process of geopolymerization between class F fly ash and alkali activator fluid (sodium silicate and sodium hydroxide). In geopolymer concretes (GPC), an inorganic polymer called aluminosilicate will act as a binder, the same as conventional concrete has Portland cement (OPC)-generated C-S-H gel. The glass fibers are added in the ratios of 3%, 6%, and 10% by weight of cement. To check the effect of geopolymer and glass fibers on compressive strength and split tensile strength of concrete, concrete cubes of size 150 × 150 × 150 mm and concrete cylinders of size 150 × 300 mm with or without geopolymer and glass fibers were casted and cured for 7, 14, 21, and 28 days. The compressive strength and split tensile strength of all concrete cubes and cylinders were determined by compression testing machine. The findings of the research study revealed that concrete having geopolymer and glass fibers used as a partial replacement of cement showed lesser strength as compared to conventional concrete. Concrete having glass fibers showed reduced workability and more segregation as compared to geopolymer concrete and normal concrete. However, the concrete made either with geopolymer or glass fibers is economical as compared to conventional concrete.

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Effect of Adding Phragmites-Australis Plant on the Chemical Shrinkage and Mechanical Properties of Mortar

et al. 2023

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Effect of using limestone fines on the chemical shrinkage of pastes and mortars

Cited by 11 publications

References 45 publications

Mechanical and Microstructural Properties of Composite Mortars with Lime, Silica Fume and Rice Husk Ash

Mechanical and Microstructural Properties of Composite Mortars with Lime, Silica Fume and Rice Husk Ash

An Investigation of Mechanical Properties of Fly Ash Based Geopolymer and Glass Fibers Concrete

Effect of Adding Phragmites-Australis Plant on the Chemical Shrinkage and Mechanical Properties of Mortar

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