In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.
Read more about membership
Become an ACI Member
Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
ACI World Headquarters
38800 Country Club Dr.
Farmington Hills, MI
ACI Middle East Regional Office
Second Floor, Office #207
The Offices 2 Building, One Central
Dubai World Trade Center Complex
Phone: +971.4.516.3208 & 3209
ACI Resource CenterSouthern California
Feedback via Email
Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Showing 1-5 of 36 Abstracts search results
March 1, 2021
Ablam Zidol, Monique T. Tognonvi, and Arezki Tagnit-Hamou
It has been demonstrated in recent studies that, unlike general-use
cement (GU), glass powder (GP) performs better in concrete mixtures with high water-binder ratios (w/b) in terms of both mechanical properties and chloride ion permeability. This paper aims to deepen investigations on the behavior of concrete incorporating GP in aggressive outdoor environments such as chloride ion diffusion, carbonation, and sulfates as a function of w/b. For comparison purposes, concretes containing conventional supplementary cementitious materials (SCMs) such as Class F fly ash (FFA) and ground-granulated blast-furnace slag (GGBFS) along
with control concrete were also studied. In general, GP-based concretes behaved as those containing SCM. Indeed, despite their high w/b, concrete incorporating GP better withstands sulfate attack than the reference. This was mainly attributed to the low chloride permeability of such concretes. Also, as commonly observed with SCM concretes, carbonation was higher with GP-based concrete and increased with w/b.
January 1, 2021
Adeyemi Adesina and Sreekanta Das
The use of cementitious composites reinforced with fibers as repair materials for concrete pavements is gaining huge attention recently due to their enhanced mechanical and durability properties. However, the use of portland cement as the main binder of these composites still poses a serious sustainability issue. The production of portland cement has been associated with the high use of raw materials and the emission of carbon dioxide into the environment. On the other hand, alkali-activated binders exist that are capable of eliminating portland cement totally. However, the activators currently used to activate these types of materials are expensive and extremely corrosive. Therefore, this study used hydrated lime, which is a less expensive, less corrosive, and eco-friendly alternative activator to produced fiber-reinforced alkali-activated composites for repair applications. The mechanical performance of the developed composites was evaluated in terms of its compressive and flexural properties, as these properties are critical to the performance of repair materials. Results from this study showed that fiber-reinforced composites produced with an eco-friendly binder exhibited excellent mechanical performance suited for various repair applications. Microstructural investigations were also carried out on the evaluated mixtures to determine the microstructural
properties of the developed mixtures.
March 1, 2020
Sikiru Folahan Oritola, Abdul Latif Saleh, and Abdul Rahman Mohd Sam
Iron ore tailings (IOTs) are common industrial solid waste products which are generated in enormous quantities during the production process of iron ore. By visual observation, this material shows some similarity with natural sand (NS); it was therefore desired to characterize the IOTs to further ascertain their use in concrete. Five types of IOTs obtained from different locations were characterized using microscopic and physical examination techniques. These methods were used to assess the structure and properties of IOTs, subsequently comparing it with that of NS. The surface image of the materials is provided and numerical information, such as the relative concentrations of atoms that comprise the materials, is also indicated. Subsequently, the structure and composition of the IOT materials are identified for possible applications in the construction industry.
Magdalena Dobiszewska and Robert W. Barnes
This paper describes a study of the use of waste basalt powder to enhance mortar properties when used as a partial replacement of fine aggregate. This basalt powder is a waste product resulting from the preparation of aggregates for asphalt mixture production. Experiments were performed on mixtures containing up to 20% replacement of sand by basalt powder to determine the impact on the compressive and flexural strength of mortar as well as on the flow characteristics, density, and porosity. The results indicate that use of basalt powder as a partial replacement of sand leads to improvement of the compressive strength and flexural strength. The mortar porosity in the capillary pore range was reduced. Use of the basalt powder can improve the management of industrial waste while improving the mechanical properties of cementitious mortar.
Bradley S. Hansen, Isaac L. Howard, Jay Shannon, Tim Cost, and Wayne M. Wilson
Portland-limestone cement (PLC) performance is controlled, to a significant extent, by limestone content and fineness. There are questions about how much fineness is needed or beneficial, with the most commonly used guidelines focused on how to achieve performance comparable to ordinary portland cement (OPC). This paper provides guidance on the production of PLC with potential concrete strength performance exceeding that of OPC and also considers (secondarily) concrete workability, setting, and durability performance. A database of related previous work was evaluated, and additional experiments were done with dedicated grinds of PLC at a single plant, from similar clinker, of varying fineness and controlled limestone contents. Findings from concrete and cement paste testing showed that the change in fineness (m2/kg) (ΔF) in relation to the change in limestone content (% limestone) (ΔL) relative to OPC can be a useful index for performance bench-marking. Specific guidance is provided where ΔF/ΔL values are in the general range of 10 to 30 and ΔF values are 110 to 175 m2/kg. Recommendations for some ΔF/ΔL values are also considered.
Results Per Page
Please enter this 5 digit unlock code on the web page.