Effect of C–S–H seed/PCE nanocomposites and triisopropanolamine on portland cement properties: Hydration kinetic and strength

Li, Haoxin; Xiang, Yuhang; Chen, Xu

doi:10.1016/j.jobe.2022.104946

Cited by 11 publications

(3 citation statements)

References 54 publications

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“…However, at 28 d, the situation is reversed and the improvements in mechanical properties of blends are larger than in plain PCs. In this sense, the synergy of C-S-H nucleation seeding and alkanolamine addition (to enhance calcium aluminate hydration) seems to be a very promising strategy to have improved mechanical strengths at 28 days and later [ 71 , 77 , 78 , 82 , 86 , 87 ].…”

Section: Activation Of Cement Hydration By C-s-h Nucleation Seedingmentioning

confidence: 99%

Recent Advances in C-S-H Nucleation Seeding for Improving Cement Performances

et al. 2023

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Reducing cement CO2 footprint is a societal need. This is being achieved mainly by replacing an increasing amount of Portland clinker by supplementary cementitious materials. However, this comes at a price: lower mechanical strengths at early ages due to slow pozzolanic reaction(s). This is being addressed by using accelerator admixtures. In this context, calcium silicate hydrate nucleation seeding seems to have a promising future, as it can accelerate cement and pozzolanic reactions at early ages, optimising their microstructures, without compromising late strength and durability performances. In fact, these features could even be improved. Moreover, other uses are low temperature concreting, precasting, shotconcrete, etc. Here, we focus on reviewing recent reports on calcium silicate hydrate seeding using commercially available admixtures. Current knowledge on the consequences of nucleation seeding on hydration reactions and on early and late mechanical strengths is discussed. It is noted that other features, in addition to the classic alite hydration acceleration, are covered here including the enhanced ettringite precipitation and the very efficient porosity refinement, which take place in the seeded binders. Finally, because the seeded binders seem to be denser, durability properties could also be enhanced although this remains to be properly established.

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Section: Activation Of Cement Hydration By C-s-h Nucleation Seedingmentioning

confidence: 99%

Recent Advances in C-S-H Nucleation Seeding for Improving Cement Performances

et al. 2023

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“…Soil stabilization is a mechanical or chemical treatment of soil for alteration of one or more properties [18]. Chemical stabilization is a typical practice that involves the use of chemical compounds or combinations [19,20].…”

Section: Introductionmentioning

confidence: 99%

Cement-Stabilized Granular Volcanic Ash Materials for Construction of Low-Traffic Roads in Yemen

Alhadama,

Almaswari,

Algaboby

2024

Advances in Civil Engineering

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Granular volcanic ash (GVA) is a volcanic activity material with low density, high porosity, and other undesirable properties that must be improved prior to use in any construction. This material can be considered an alternative for use in road building, given its availability in many locations and in large quantities in Yemen. This article aims to investigate the potential use of GVA for the construction of roads in Yemen when treated with cement stabilizer. Two types of GVA materials with different colors were selected and referred to as red and black GVA materials. Tests performed included the unconfined compressive strength (UCS), compaction, indirect tensile strength (ITS), wetting–drying durability test, and ultrasonic pulse velocity (UPV) test for samples curried for 7 and 28 days. For each GVA–cement mixture, the cement content varied as 2%, 5%, and 8% by dry weight of GVA. Test results revealed that the compaction energy applied during sample preparation led to a significant reduction in the finesse modulus for red and black coarse GVA materials, with reductions of 10% and 23%, respectively. In addition, the cement content and curing period had a significant effect on UCS, ITS, and UPV for cement-treated GVA. The applicable quantity of cement required stabilizing GVA and achieving the base course specification for strength and durability criteria in flexible pavement with low traffic is 8% cement.

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“…The most frequently used SCMs currently include: Fly ash (FA) [ 59 ]; Silica fume (SF) [ 60 ]; Ground or granulated blast-furnace slag (GGBS) [ 61 ]; Nanosilica (nS) [ 62 ]; C-S-H nanoseeds [ 63 , 64 ]; Waste glass, limestone powder, crumb rubber, and others [ 65 , 66 ]. …”

Section: Introductionmentioning

confidence: 99%

Fracture Performance of Cementitious Composites Based on Quaternary Blended Cements

Golewski

2022

Materials

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This study presents test results and in-depth discussion regarding the measurement of the fracture mechanics parameters of new concrete composites based on quaternary blended cements (QBC). A composition of the two most commonly used mineral additives, i.e., fly ash (FA) and silica fume (SF), in combination with nanosilica (nS), has been proposed as a partial replacement for ordinary Portland cement (OPC) binder. Four series of concrete were made, one of which was the reference concrete (REF) and the remaining three were QBC. During the research, the main mechanical parameters of compressive strength (fcm) and splitting tensile strength (fctm), as well as fracture mechanics parameters and the critical stress intensity factor (KIcS), along with critical crack-tip opening displacements (CTODc) were investigated. Based on the tests, it was found that the total addition of siliceous materials, i.e., SF + nS without FA, increases the strength and fracture parameters of concrete by approximately 40%. On the other hand, supplementing the composition of the binder with SF and nS with 5% of FA additive causes an increase in all mechanical parameters by approximately 10%, whereas an increase by another 10% in the FA content in the concrete mix causes a significant decrease in all the analyzed factors by 10%, compared to the composite with the addition of silica modifiers only.

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Effect of C–S–H seed/PCE nanocomposites and triisopropanolamine on portland cement properties: Hydration kinetic and strength

Cited by 11 publications

References 54 publications

Recent Advances in C-S-H Nucleation Seeding for Improving Cement Performances

Recent Advances in C-S-H Nucleation Seeding for Improving Cement Performances

Cement-Stabilized Granular Volcanic Ash Materials for Construction of Low-Traffic Roads in Yemen

Fracture Performance of Cementitious Composites Based on Quaternary Blended Cements

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