Geopolymer concrete (GPC) is one of the sustainable means to reduce CO 2 emissions and energy utilization during the production and utilization of cement in the construction industry [35], [36]. Recently, the use of geopolymer (GP) in concrete as sustainable materials has been increased as shown in Fig. 3.
Concrete admixtures (additives) enhances the properties of concrete for applications in construction with special requirements. Concrete additives are used to achieve desired workability in case of low water cement ratio, and to enhance setting time of concrete for long distance transportation of concrete. So, it is of much importance for a civil site …
Presently, AM manufacturing attracts engineers because it allows for the production of concrete with intuitive designs and shapes with lucrative architectural components.
This paper discusses the state-of-the-art of the fine recycled concrete aggregates (fRCA), focusing on their physical and chemical properties, engineering properties and durability of concretes with fRCA.
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This paper reviews the state of the field of nanotechnology in concrete. Definitions of nanotechnology, including nanoscience and nano-engineering in concrete, are provided. The impact of recent advances in instrumentation and computational materials science and their use in concrete research is discussed. Recent progress in nano …
Thermal bridging within the concrete was broken by the pores in biochar, causing enhancement of the thermal insulation and humidity control properties [ 68 ]. In addition to the microstructure, chemical stability also plays an important role when biochar is applied as a constituent of concrete in building construction.
The present paper discusses the various possible recycled aggregates used in concrete production, their effect on both fresh and hardened properties as well as durability performances.
Process water is often related to washout and coring operations but may also include stormwater, which collects a measurable amount of cementitious material from areas surrounding the production facility. Characteristics of concrete process water. Concrete process water is caustic and typically has a high pH value ranging between 11 …
The admixtures' role in modern concrete technology is described with an emphasis on superplasticizer chemistry and its cement-paste rheological modification mechanism. Cement with atypical properties, such as calcium aluminate, white, low energy and expansive cements are characterized.
In the design presented here, the sample compositions are such that the plastic additive displaces a fraction of OPC. Because OPC production contributes so heavily to carbon emissions, achieving a high-strength concrete using an irradiated plastic additive would provide a solution that not only takes advantage of the known mechanical ...
This in-depth review delves into various aspects of biochar-concrete composites. It commences by defining biochar and exploring its production methods, physical and chemical properties. Additionally, the review provides an overview of concrete, emphasising its composition, properties and the challenges associated with …
The production of Portland cement (PC) is a major contributor to global carbon dioxide (CO2) emissions. Addressing these environmental concerns necessitates the exploration of alternative cement. Consequently, geopolymer cement concrete (GPC) has emerged as a promising candidate due to its reduced carbon footprint and …
This paper provides a comprehensive analysis of decarbonising cement and concrete production, addressing strategies, technologies, policy consideratio…
Abstract. Chemical admixtures are nowadays very important for concrete design. This chapter presents an overview of the chemical structures of different organic chemical admixtures, ranging from small organic compounds to large polymers having a certain polydispersity, and of both natural and synthetic origin.
This publication covers the materials used in concrete and the essentials required to design and control concrete mixtures for a wide variety of structures. Figure 1-1. Concrete components: cement, water, coarse aggregate, fine aggregate, supplementary cementing materials, and chemical admixtures. Figure 1-2.
The emissions from mineral and chemical admixtures are small relative to these other components of concrete production despite their typically longer transportation distances to the batching sites ...
What does a Cement Production Engineer do? Production engineers supervise and improve production throughout plants or factories by supporting engineering teams, drafting safety protocols, reporting issues to management, and creating strategies that will enhance efficiency and profits. They supervise staff at the plant or factory and ensure all ...
Even if cement is a well-consolidated material, the chemistry of cement (and the chemistry inside cement) remains very complex and still non-obvious. What is sure is that the hydration mechanism plays a pivotal role in the development of cements with specific final chemical compositions, mechanical properties, and porosities. This …
A critical review of the effect of combination of these mineral and chemical admixtures on various rheological, strength and durability properties of the self-compacting concrete is presented in this paper.
Cement is one of the key ingredients of concrete, along with water and sand, and it has a global annual production of around 4 Gt, (1) with further growth expected in the future. (2) Although cement comprises only around 10% of the total weight of concrete, it contributes to approximately 70% of the greenhouse gas emissions associated with concrete …
furnace from C to C for four hours to produce coconut shell ash (CSA), after XRF analysis was carried out to determine its pozzolanic property, which was used as partial replacement of cement in concrete production. Concrete cubes were produced using graded levels of 0, 10, 15, and 20 percent replacement of CSA for Ordinary Portland Cement.
This study utilized RHA as a cement replacement with the addition of chemical admixture. An investigation of the influence of RHA and accelerating admixture on the compressive strength of concrete ...
Aggregates play a crucial role in concrete production, providing the necessary granular materials for its composition. These materials can be natural, manufactured, or recycled, encompassing a variety of options such as gravel, crushed stone, sand, slag, recycled concrete, and geosynthetic aggregates.
After water, concrete is the world's second most consumed material, and represents the cornerstone of modern infrastructure. During its manufacturing, however, large quantities of carbon dioxide are released, both as a chemical byproduct of cement production and in the energy required to fuel these reactions.
This review intends to provide insightful information on the production technologies that are already available in the cement industry and could be used in the large scale manufacturing of alkali-activated cement and concrete, with limited investment [ …
Self-healing of concrete is a complicated process that involves a combination of physical, chemical, and mechanical forces. Due to the low tensile strength of concrete, cracks are a regular occurrence.
CEMEX, , and ENERTRAG have set up the Concrete Chemicals consortium to produce sustainable aviation fuels (SAFs) from CO2 captured from a cement facility and hydrogen produced with renewable energy.
The Egyptians used lime and gypsum cement. In 1756, British engineer, John Smeaton made the first modern concrete (hydraulic cement) by adding pebbles as a coarse aggregate and mixing powered brick into the cement. In 1824, English inventor, Joseph Aspdin invented Portland Cement, which has remained the dominant cement used in …
Concrete curing is the process of allowing newly placed concrete to harden and set over time. It is an important step in the concrete production process that helps to ensure that the concrete reaches its desired strength, durability, and performance characteristics.
Several different carbon-capture technologies have been proposed for use in the cement industry. This paper reviews their attributes, the progress that has been made toward their commercialization, and the major challenges facing their retrofitting to existing cement plants. A technology readiness level (TRL) scale for carbon capture in the …
We first discuss cement production and special nomenclature used by cement industrialists in expressing the composition of their cement products.
Determined research efforts have been focused on investigating waste materials with similar physical and engineering qualities to the traditional materials. Thus, a sure option of making concrete production more sustainable and eco-friendly is incorporating wastes as an alternative material for concrete production.
Chemical admixtures constitute indispensable ingredients for the production of modern advanced concrete. In developed countries, at least 80% of the concrete produced contains one or several admixtures. They include plasticizers, superplasticizers, retarders, accelerators, stabilizers, deers, ers and shrinkage reducers, to …
Chemical engineering is a type of engineering that involves chemical production and manufacturing processes. Professionals interested in chemical engineering can work in a variety of industries, including …
