Efficiency of stabilization of slag suspensions by polycarboxylate

Самченко, Светлана; Kozlova, I. V.; Zemskova, Оlga; Potaev, Denis; Tsakhilova, Dana

doi:10.1051/e3sconf/20199102039

Cited by 10 publications

(7 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ettringite formation must end in the initial period of hardening. During this period, the matrix still has plastic properties and volume changes that occur during crystallization do not disrupt the matrix structure [ 21 , 22 , 23 ]. However, it is necessary to choose a supersulfated binder composition for which expansion from the ettringite crystallization is sufficient to compensate the reduction of concrete volume due to shrinkage.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Supersulfated Cement Applied to Produce Lightweight Concrete

et al. 2021

View full text Add to dashboard Cite

The physical and mechanical characteristics of expanded-clay lightweight concrete based on a supersulfated binder in comparison with lightweight concrete based on ordinary Portland cement were studied. In replacing CEM 32.5 with a supersulfated binder of 6000 cm2/g specific surface, one can increase the tensile strength in bending up to 20% and can increase the ratio of the tensile strength in bending to the compressive strength that indicates the crack resistance increase of concrete. Compressive strengths at the age of 28 days were equal to 17.0 MPa and 16.6 MPa for the supersulfated binder of 3500 cm2/g specific surface and CEM 32.5, respectively. Shrinkage deformation of hardening concrete, indicators of fracture toughness, frost resistance, and thermal conductivity were determined during the experimental works. The coefficient of thermal conductivity decreased up to 12% compared to the use of CEM 32.5. An enhancement in concrete properties was associated with the increase of supersulfated binder fineness.

show abstract

Section: Resultsmentioning

confidence: 99%

“…It is important that the formation of crystalline high-base calcium hydrosulfoaluminates ends in the initial period of hardening. During this period, the matrix still has plastic properties and volume changes that occur during crystallization do not disrupt the matrix structure [ 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Supersulfated Cement Applied to Produce Lightweight Concrete

et al. 2021

View full text Add to dashboard Cite

show abstract

“…In this case the cost of silica-based micro-cement will be lower since silica gel is a by-product of industry. It is necessary to take into account the environmental effect of its use as a secondary resource [51][52][53][54][55][56].…”

Section: Research Results and Discussionmentioning

confidence: 99%

Micro-Cement for Injection Consolidation of Base Soils

Smirnova*,

Glazev,

Komolov

et al. 2019

IJITEE

View full text Add to dashboard Cite

Issues of development of compositions of injectable materials on inorganic basis for underground and transport construction are considered in the paper. Inorganic binders for aqueous suspensions for strengthening of low-strength sandy and debris soils by injection into the fortified massif are proposed. The use of silica gel in combination with hydrated lime for injectable aqueous suspensions is justified. The influence of superplasticizer on the technological properties of suspensions is shown. The properties of micro-cement of different compositions are presented. Optimal ratios of components were determined. The following properties of aqueous suspensions have been studied: viscosity, sedimentation and penetrating power. The viscosity was up to 40 s, sedimentation up to 1.4%. Soil-concrete obtained by injecting the aqueous suspension based on composite binders has the compressive strength in the range of 3.3-6.2MPa.

show abstract

“…The main advantages when using the fiber-reinforced spray concrete for walling the mine workings are as follows [83][84][85][86][87][88]:…”

Section: Discussionmentioning

confidence: 99%

Strain Hardening of Polypropylene Microfiber Reinforced Composite Based on Alkali-Activated Slag Matrix

Smirnova

Pidal²,

Alekseev³

et al. 2022

Materials

View full text Add to dashboard Cite

A comparative study of the fracture features, strength and deformation properties of pseudo strain-hardening composites based on alkali-activated slag and Portland cement matrices with polypropylene microfiber was carried out. Correlations between their compositions and characteristics of stress–strain diagrams under tension in bending with an additional determination of acoustic emission parameters were determined. An average strength alkali-activated slag matrix with compressive strength of 40 MPa and a high-strength Portland cement matrix with compressive strength of 70 MPa were used. The matrix compositions were selected for high filling the composites with polypropylene microfiber in the amount of 5%-vol. and 3.5%-vol. ensuring the workability at the low water-to-binder ratios of 0.22 and 0.3 for Portland cement and alkali-activated slag matrices, respectively. Deformation diagrams were obtained for all studied compositions. Peaks in the number of acoustic signals in alkali-activated slag composites were observed only in the strain-softening zone. Graphs of dependence of the rate of acoustic events occurrence in samples from the start of the test experimentally prove that this method of non-destructive testing can be used to monitor structures based on strain-hardening composites.

show abstract

Efficiency of stabilization of slag suspensions by polycarboxylate

Cited by 10 publications

References 13 publications

Supersulfated Cement Applied to Produce Lightweight Concrete

Supersulfated Cement Applied to Produce Lightweight Concrete

Micro-Cement for Injection Consolidation of Base Soils

Strain Hardening of Polypropylene Microfiber Reinforced Composite Based on Alkali-Activated Slag Matrix

Contact Info

Product

Resources

About