The purpose of this paper is to list and discuss briefly some of the causes of chemical and physico-chemical disintegration of concrete and to point out some methods that can be used to study these causes. In this paper a distinction is made between physico-chemical (or chemico-physical) and mechanical causes of failure. Processes involving changes in chemical composition (chemical reactions pr...

The main strategy to reduce the environmental impact of the concrete industry is to reuse the waste materials. This research has considered the combination of cement replacement by industrial by-products, and natural coarse aggregate substitution by recycled aggregate. The aim is to evaluate the behavior of concretes with a reduced impact on the environment by replacing a 50% of cement by indus...

This paper is based on an experimental research that examined the effects of concrete`s major parameters on durability of concrete pavements and curbs under freezing and thawing cycles. These parameters include concrete mix design parameters such as water-cement ratio, fine aggregate percentage and using air entraining admixture and simulating real freeze-thaw cycles that infrastructures underg...

Sustainability is important to the well-being of our planet, continued growth of a society, and human development. Concrete is one of the most widely used construction materials in the world. However, the production of portland cement, an essential constituent of concrete, leads to the release of significant amount of CO2, a greenhouse gas (GHG); production of one ton of portland cement produce...

In this research, bentonite soil was stabilized with cement and epoxy resin additives by gradually increasing the ratio of to water withstand six successive wetting/drying (W/D) cycles. Unconfined compressive strength (UCS) tests were performed on samples after curing 24 h soaking in third sixth The swelling–shrinkage potential evaluated indirectly analyzing its stress–strain behavior. results ...

This article presents the results of a study dealing with the utilization of sludge water from a concrete plant as a partial replacement for mixing water in the production of cement composites. The replacement of mixing water with sludge water from a concrete plant was carried out in the amounts of 20% and 50%. The following tests were carried out in order to determine the effect of the replace...

This study examines the impact of bacterial concrete on strength and self-healing. Bacterial has better compressive strength, permeability, corrosion resistance, chemical precursors, alkalinity mechanical stress. Bacillus subtilis calcium lactate spore powder effects are explored in this study, influence form self-healing capacity to crack repair. The concentration 105 cells/mL is used with 0.3...

Abstract Climate action around the world has shifted to potential of global warming contribution from design and construction infrastructures, especially those in demand for concrete. Concrete production use have been identified as contributing >5% world’s greenhouse gas (GHG) emissions. The main aim this research work is critically study net-zero sustainability potentials that can lever...

The objective of this paper is to examine the possible use of new blended cements containing calcareous fly ash in structural concrete, potentially adequate for structural elements of nuclear power plants. The investigation included five new cements made with different contents of non-clinker constituents: calcareous fly ash, siliceous fly ash, ground granulated blastfurnace slag, and a referen...