In this paper, properties of concretes incorporating recycling waste and corrosion susceptibility reinforcing steel bars were studied. It was established that fineness ground granulated blast furnace slag (GGBFS) fly ash (FA) their simultaneous combination have an influence on the kinetics strength development Portland cements concretes. The compressive concrete containing 10% by mass GGBFS FA even exceeds control 6.5% 20% 8.8% after 56 days hardening. formation extra amount ettringite,...

Nowadays, the most common ways to dispose of acid tars and paper production waste are burial or incineration, but it is ecologically economically expedient use such in building materials. A new variant filler aggregate—wastepaper sludge ash (paper waste) a chemical activator for aggregates—acid tar (oil-refining industry proposed. Elemental mineralogical compositions wastepaper comparison with commodity limestone mineral powder established. Chemical activation was carried out wetting...

Investigations concerning the processes of plugging stone structure formation, using X-ray diffraction, electronic microscopy and differential thermal analyses, were implemented.Influence active mineral additives metakaolin zeolite on properties mortar their interaction with Portland cement minerals aid model systems established.

High-strength concrete is effectively used worldwide in the last three decades, but it more brittle comparison with normal strength concretes. Partial substitution of cement by active mineral additives and usage chemical admixture plasticizing air-entraining action can considerably change their fracture properties. The obtained results show that increase properties observed concretes modified admixtures incorporating such as zeolite limestone due to consolidation microstructure....

In this study, properties and peculiarities of hydration processes as well paste microstructure blended cements containing 10% by weight natural zeolite were investigated. Free calcium hydroxide content, crystalline products microstructural architecture hydrated cement pastes examined physical chemical methods. It was found that the addition provides formation an extra amount fine ettringite tobermorite-like hydrosilicates CSH (B) type in mineral non-clinker part Portland resulting strength...

The hydraulic properties of ash from incinerated wastepaper sludge were investigated. It is shown that the phase composition after heat treatment similar to classical fired carbonate-clay mixes. necessity using combination retarding admixtures with different action mechanism shown. strength in initial hardening period ensured by formation AFm-phases and ettringite, subsequently increasing role CSH.

Abstract The formulations were developed for road over-stabilized cationic bitumen emulsions on hydrochloric acid and cation-active emulsifiers. There determined the physical-mechanical properties of produced, while special at-tention was paid to breaking behavior. defined influ-ence emulsifier content type upon emulsions’ indices, as well behavior – by four methods: break-ing value, miscibility with open-grade dense-grade mixes, fines mixing time, stability cement. makes most impressive...

Abstract Concrete block pavements have become an attractive engineering and economical alternative to both flexible rigid because of it’s high strength durability. The influence pozzolanic mineral additions – natural zeolite expanded perlite powder on the properties concrete interlocking blocks in different curing conditions has been studied. use as a substitute for cement production increased water demand but decreased absorption blocks. Obtained results show, that with 10% substitution...

This article describes the classification of cationic bitumen emulsions according to "reactivity" and breaking behaviour characteristics. The methods researching characteristics for different in accordance with European Ukrainian regulatory documents are presented. Available possible emulsifiers Ukraine over-stabilised given a description road technology where they can be applied. experience using construction is characterized. Namely, literature review use soil stabilization technologies,...

It has been shown that in the conditions of aggravation ecological problems, shortage high-quality raw materials for production Portland cement clinker a promising direction industry development is more extensive waste utilization as well low energy consuming and modified composite cements, characterized by high content active mineral additives.The use cements both mortars concretes provides their quality durability great social benefit terms resources preservation, saving, environmental...

Abstract Concrete pavements is an attractive alternative to asphalt because of its lower cost and higher durability. Major contribution sustainable development can be made by partial replacement cement in concrete pavement with supplementary cementitious materials different nature origin. In this paper, the effect natural zeolite perlite additives complex chemical admixtures on structure properties for was studied. Compressive flexural strength test used study mechanical behavior designed...

Concrete production is one of the largest consumers natural non-metallic materials. To mitigate environmental impact associated with cement The use wastepaper sludge ash (WSA) from paper recycling a new promising direction for saving fuel, energy, and resources in concrete production, aimed at reducing proportion clinker by replacing part supplementary cementitious This approach aligns priority principles uniform sustainable industry development creating environmentally friendly,...

Nowadays conventional binding material for the construction sector is Portland cement. cement consists mainly of high-energy intensive with a significant carbon footprint clinker. Reduction clinker content in materials becomes utmost priority scientists field, it reflected manufacturers’ Sustainability Road Maps. This fact triggers searches and actions different directions such as improving grinding technologies, chemical additives admixtures development, extension cementitious portfolio...

The effect of the air-entraining agent on properties mortar mixtures as well compressive strength hardened mortars was objective this study.Such contain a certain amount evenly spread closed air-voids pores with dimensions 0.02-0.05mm.On one hand, presence large volume such air bubbles results in reduction mechanical mortar.On other use technological approach improves rheological mixture.The entrainment flow, density, entrained mixture and established.Obtained show substantial increasing...

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Pavement grade cationic bitumen emulsions formulations were developed for Slurry Surfacing based on orthophosphoric and hydrochloric acids with both all-purpose specialized emulsifiers used. As a result, there established relations of mix time upon cement - various emulsifiers. Mix (having different content) is characterized by parabolic relation, branches the parabola going down. Still, slope steepness acid higher than acid. The regularity investigated allows affirming that dosing...