Complex multifunctional additive for anchoring grout based on alkali-activated portland cement

Schroeyers, Wouter; Petropavlovskyi, Oleh; Rudenko, Igor; Konstantynovskyi, Oleksandr; Kovalchuk, A. V.

doi:10.1088/1757-899x/907/1/012055

Cited by 17 publications

(13 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are data on the effective disposal of radioactive waste [19], as well as wastewater [20], when making safe building materials based on the alkali-activated types of cement. The principles were proposed for the reasonable selection of modifying admixtures for different functional purposes for concrete based on the alkaline-activated types of cement (plasticizers [21], redispersion polymeric powders [22], aimed at reducing the deformities of shrinkage [23], expandable admixtures [24]). This explains the widespread use of the alkaline-activated slag types of cement in modern concrete and mortars.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Design of slag cement, activated by Na (K) salts of strong acids, for concrete reinforced with steel fittings

Kryvenko

Rudenko

Konstantynovskyi

2020

EEJET

View full text Add to dashboard Cite

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Design of slag cement, activated by Na (K) salts of strong acids, for concrete reinforced with steel fittings

Kryvenko

Rudenko

Konstantynovskyi

2020

EEJET

View full text Add to dashboard Cite

“…This phenomena is caused by salts of strong acids (further, SSA's), like chlorides and sulfates, dissolved in seawater [29,30]. At that, seawater ensures increasing of AASC concrete consistency [31] and concrete strength [32] that is explained by effect of SSA's [33,34].…”

Section: Introductionmentioning

confidence: 99%

“…This type of modification provides mitigation of steel reinforcement corrosion. Effect of CAD is caused by less water, acceleration of crystallization, alteration of porous structure as well as by changes in morphology of hydrated phases [33,34].…”

Section: Introductionmentioning

confidence: 99%

Prevention of steel reinforcement corrosion in alkali-activated slag cement concrete mixed with seawater

et al. 2021

View full text Add to dashboard Cite

Concretes mixed with seawater are characterised by enhanced performances, but action of chlorides and sulfates ensures the risk of reinforcement corrosion. Application of high consistency fresh concretes ensures changes in hardened concrete structure that causes the problem of steel reinforcement passive state ensuring. Thus mixing of plasticized concretes by seawater actualizes the search for means of steel corrosion prevention. Alkali-activated slag cements (further, AASC’s) reduce effect of ions Cl− and SO42− on steel reinforcement in concrete due to their exchange for ions OH− in the structure of zeolite-like alkaline hydroaluminosilicates. Complex additive «portland cement - calcium aluminate cement - clinoptilolite» was proposed to enhance the protective properties of AASC concretes to steel reinforcement. The results of DTA, X-ray diffraction, electron microscopy, microprobe analysis show that complex additive ensures to prevent steel reinforcement corrosion in AASC concrete mixed with seawater due to binding Cl− and SO42− ions in Kuzel’s salt in AASC hydration products and exchange of these aggressive ions with OH− ions in the structure of clinoptilolite. This effect of complex additive confirmed by surface state and the absence of mass loss of steel rebars embedded in plasticized AASC fine concrete mixed with seawater after 90 d of hardening.

show abstract

“…With the introduction of mineral additives of different types, it is possible to obtain a low-CO 2 multicomponent cements [25][26][27]. To accelerate the processes of early structure formation, it is advisable to use alkaline activation [28,29]. Of particular note are decorative multi-component alkali activated cements for restoration and finishing works, which are chemically analogous to Roman cement [30].…”

Section: Introductionmentioning

confidence: 99%

Suitability of modified low carbon Roman cements for architectural restoration

et al. 2021

View full text Add to dashboard Cite

Article is devoted to the investigation of suitability of low carbon Roman cement for restoration and finishing works. The history of the development of Roman cement as a natural hydraulic binder, which was commonly used to decorate building facades in the 19th and early 20th centuries, is presented. The properties of mortars based on Roman cement make it an excellent product for architectural restoration and conservation, as they are characterized by fast setting, high porosity typical for lime mortars, high resistance to weather conditions, high initial strength. At the same time, due to the high surface activity and increased water demand for cement, with the age of hardening, shrinkage deformations can develop, which leads to the formation of main cracks on the surface of the products. It is shown that the addition of gypsum is an effective regulator of the setting time of Roman cement and contributes to an increase in the strength of the cement paste. Analogs of Roman cement based on multicomponent cement binders modified with plasticizing and air-entraining additives are presented.

show abstract

Complex multifunctional additive for anchoring grout based on alkali-activated portland cement

Cited by 17 publications

References 26 publications

Design of slag cement, activated by Na (K) salts of strong acids, for concrete reinforced with steel fittings

Design of slag cement, activated by Na (K) salts of strong acids, for concrete reinforced with steel fittings

Prevention of steel reinforcement corrosion in alkali-activated slag cement concrete mixed with seawater

Suitability of modified low carbon Roman cements for architectural restoration

Contact Info

Product

Resources

About