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Showing 1 to 20 of 20 for “"supplementary cementitious materials (SCMs)"”.
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Development and Structural Performance Assessment of Low-Carbon Concrete Using Recycled Concrete Aggregates and Secondary Materials
… of recycled concrete aggregates (RCA) and supplementary cementitious materials (SCMs) as sustainable material alternatives to conventional concrete materials. Extensive materials testing and analysis of existing literature found that RCA sources possess up to 21% lower bulk specific gravity …
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High-volume recycled materials for sustainable transportation infrastructure
… concrete made with high-volume of recycled materials in transportation infrastructure. The main focus was to develop mixtures for rigid pavement construction. A variety of fine and coarse recycled concrete aggregates (RCA) were investigated. The feasibility of replacing 50% of Portland …
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Design and performance of cost-effective ultra high performance concrete for bridge deck overlays
… of the pavement. The UHPC was optimized using supplementary cementitious materials (SCMs), proper combinations of sands, and adequate selection of fiber types and contents. Packing density studies included paste, sand, and fiber combinations. The robustness of optimized UHPC mixtures to …
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The productive reuse of coal, biomass and co-fired fly ash
… Therefore, this research examines their use as supplementary cementitious materials (SCMs) in concrete and as precursors for alkali-activated geopolymers. Toward their potential use as an SCM, after characterizing these ashes assessing their compliance with ASTM C618 requirements, their impact …
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Advancements in concrete material sustainability : supplementary cementitious material development and pollutant interaction
Calcined clay and fly ash supplementary cementitious materials (SCMs) used in cement based materials were examined for their chemical and mechanical performance, as well as their pollutant interaction. This dissertation addresses three primary research questions, namely: (i) can zincite additions …
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A review on the efficiency of different supplementary cementitious materials as a partial replacement for Portland cement in concrete
… researchers have explored the use of some waste materials and naturally occurring minerals as a partial replacement for cement in concrete. These materials are often referred to as supplementary cementitious materials (SCMs). Apart from the potential benefits of these SCMs for the properties of …
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Chloride binding and desorption mechanism in blended cement containing supplementary cementitious materials exposed to de-icing brine solutions
… chloride desorption mechanisms in different cementitious systems exposed to de-icing brines, and (3) analyze pH and compositional changes in blended pastes under chloride contamination and carbonation. First, factors impacting chloride binding measurements were identified, such as sample form …
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Development of the materials, construction, and maintenance phases of a life cycle assessment tool for pavements
… with collaborative studies investigating the materials, use, and end-of-life phases. A tool verification study investigated the environmental impacts of the materials, construction, and maintenance/rehabilitation phases for a rigid pavement roadway. Cement, which had the highest impact for …
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AI-powered Data Mining for the Development of Sustainable Concrete Materials
… the development of more sustainable concrete materials. Focusing on concrete manufacturing, we develop AI-powered methodologies tailored to real-world industrial data and complex scientific literature. For industrial data mining, we propose to incorporate interpretability and realistic …
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Sustainable 3D Concrete Printing for Eco-conscious Construction: Recycled Aggregates and Low-carbon Binders
… cement can be achieved through the use of supplementary cementitious materials (SCMs) such as fly ash, silica fume, slag, and metakaolin, while simultaneously increasing the aggregate-to-binder ratio to 1.75. Printable mixtures were developed with 60% of the total binder volume consisting …
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Experimental studies of sorption and transport of moisture in cement based materials with supplementary cementitious materials
Most deterioration processes in cement based materials are closely related to moisture sorption and moisture transport properties. Therefore, it is important to study these properties, both theoretically and practically. This work is an experimental investigation in this field. Nowadays, the cement …
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Durability Assessment and Service Life Prediction of Concrete in Extreme Aggressive Environment
… water-to-cement (w/c) ratios and used different supplementary cementitious materials (SCMs) such as fly ash, slag, silica fume, and metakaolin. The research aimed to correlate the diffusion coefficients obtained from RMT and the BD tests with SR and BR values to establish threshold values that …
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Composition and microstructure of concrete mixtures subjected to biogenic acid corrosion and their role in corrosion prediction of concrete outfall sewers
… the chemical composition of binders (cement and supplementary cementitious materials (SCMs)) and microstructural characteristics of concrete mixtures used in the manufacture of sewer pipes. The needed properties of concrete mixtures for sewer pipe applications can be determined by biogenic …
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EFFECT OF CRACK-REDUCING TECHNOLOGIES AND SUPPLEMENTARY CEMENTITIOUS MATERIALS ON SETTLEMENT CRACKING OF PLASTIC CONCRETE AND DURABILITY PERFORMANCE OF HARDENED CONCRETE
… The effects of crack-reducing technologies and supplementary cementitious materials on plastic settlement cracking and the durability of concrete subjected to freezing and thawing were evaluated. The study of settlement cracking included 86 concrete mixtures containing internal curing (IC), a …
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EFFECTS OF DEICING SALTS ON THE DURABILITY OF CONCRETE INCORPORATING SUPPLEMENTARY CEMENTITIOUS MATERIALS
… of concrete mixtures incorporating one of two supplementary cementitious materials (SCMs), slag cement or Class C fly ash, exposed to sodium chloride (NaCl), calcium chloride (CaCl2), or magnesium chloride (MgCl2) is evaluated based on damage due to wetting and drying and scaling, with the goal …
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Properties of Western Cape concrete with metakaolin
… carbon dioxide (CO2) during the burning of raw materials. With these problems, the use of Supplementary Cementitious Materials (SCMs) is found to be an appropriate solution, as it contributes to the reduction of cement used in concrete by partially replacing cement with SCMs. However, a …
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Macro - and Microstructure Evaluation and Field Applications of Concrete with Recycled Glass Pozzolan
… by replacing a percentage of cement with supplementary cementitious materials (SCMs), consisting mainly of fly-ash (FA) and ground granulated blast furnace slag (GGBS or Slag). The addition of SCMs is necessary to achieve high strength, increased durability, and lower permeability of …
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A MULTISCALE EXPERIMENTAL INVESTIGATION OF MICROSTRUCTURAL DEVELOPMENT, MASS TRANSPORT, AND CARBONATION PHENOMENA IN LOW CLINKER CEMENTITIOUS MATERIALS
… 5-8% of anthropogenic CO2 emissions. Low-clinker cementitious materials offer enormous CO2 reduction potential due to their lower embodied energy, lowered calcination temperatures, low clinker content, and the reduced content of limestone in the clinker feed. This study aims to implement a …
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Resource efficiency decision-making tools for industry: a new environmental performance metric for clinker manufacturing
… it combines the interactions between energy and materials into a single metric capable of highlighting inefficient processes and waste flows. Nonetheless, real-time studies of industrial operations are data-intensive and time-consuming, often requiring data “cleaning”, and regularly facing …
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Biogenic acid corrosion of sewer concretes with different binders: in-situ and model studies, with advancement of the life factor prediction method
… using Portland Cement (PC) based systems with Supplementary Cementitious Materials (SCMs). However, other binder systems such as Calcium Aluminate Cement (CAC) and Calcium Sulpho-Aluminate cement (CSA) have been less studied, despite showing higher potential in suppressing biogenic corrosion. …