The prime objective of life cycle impact assessment (LCIA) is to unite life cycle inventory results to the equivalent environmental effects. There is a large number of …

In this work, we successfully demonstrate that these ancient concrete design practices could be applied for the development of modern OPC-based formulations, thus showing far-reaching implications for extended …

Fig. 2 demonstrates a simplified method of porosity analysis in a small concrete sample with a roughly disk-shaped geometry and diameter of 8 mm. The Fig. 2 (a) shows a CT slice image in greyscale, with a large spherical pore shown in the bottom right of the sample, and various smaller irregular shaped pores (black). Also clear are the …

Published: 22 September 2020. Environmental impacts and decarbonization strategies in the cement and concrete industries. G. Habert, S. A. Miller, V. M. John, J. L. Provis, A. …

This paper presents a case study of the manufacture of full-scale geopolymer cement concrete components. Mechanical characteristics of geopolymer cement concrete produced at the plant, quality of form finishes, and strategies for curing are described. Challenges to full-scale production, as identified by plant personnel and the research …

The aim of Cement and Concrete Research is to publish the best research on the materials science and engineering of cement, cement composites, mortars, concrete and other …

April 3, 2020. Press Inquiries. Caption. After water, concrete is the most consumed material on Earth. Researchers in the MIT Concrete Sustainability Hub study how to reduce its impact. Credits. Photo: Life of …

The MIT Concrete Sustainability Hub (CSHub) is a dedicated interdisciplinary team of researchers from several departments across MIT working on concrete and infrastructure science, engineering, and economics since 2009. The MIT CSHub brings together leaders from academia, industry, and government to develop breakthroughs using a holistic ...

The study aimed to analyze the synergistic effects of a cement-based mixture consisting of RHA and FA in different proportions on concrete's fresh, hardened, non-destructive and microscopic ...

This study demonstrates that when cement is replaced by FA in concrete, the sorptivity of concrete increases with the replacement level. But in case of concrete …

In its simplest form, concrete is a mixture of paste and aggregates. The paste, composed of portland cement and water, coats the surface of the fine and coarse aggregates. Through a chemical reaction called hydration, the paste hardens and gains strength to form the rock-like mass known as concrete. Within this process lies the key to a ...

Another study reported that the natural self-healing in concrete can occur through four different processes: (1) precipitation of calcium carbonate or calcium hydroxide, (2) blocking of cracks by impurities in water, (3) continuation of hydration of unreacted cement or additive cementitious materials, and (4) expansion of hydrated products ...

1. Introduction. Concrete is a composite construction material made up of water, cement, aggregates (fine and coarse), and sometimes extra materials called admixtures and is widely used in civil engineering works [1], [2], [3], [4].This is because concrete is by far the most durable construction material, robust, and performs well …

Carbon dioxide emissions from geopolymer cement concrete are low compared with portland cement concrete, and the binder incorporates high volumes of the recycled material fly ash. The typical strength of the resulting materials ranges from 4000 to 10,000 psi (28 to 69 MPa) depending on mixture proportions, aggregates, and curing.

Why study concrete sustainability? More concrete is produced than any other material on Earth. In the foreseeable future, there is no other material that can replace concrete to meet our societies' needs for housing, …

Rice husk ash (RHA) possesses high pozzolanic activities and very suitable as partial replacement of cement in concrete. This paper presents a comparative study on use of RHA as partial replacement of cement in concrete specimens. Review of the researches on physical, mechanical and structural properties of concrete containing …

To conduct our study, we prepared concrete specimens in the form of both cylinders and cubes. These specimens were produced using two primary types of aggregates: coarse aggregate and ...

and a lack of proper maintenance. Few studies focus on the impact of sewer pipelines under the pavement on the cracking of urban cement concrete pavements. This study examines the service conditions of PCC pavements in seasonal frost regions. In seasonal frost regions, premature failure of cement concrete pavements often occurs

2.2. Mix calculations. According to IS 10262–2019 [11] and IS 456–2000 [10], the concrete mix design for M30 grade of concrete was developed in the current study using a ratio of 1:0.75:1:5 and a water/cement ratio of 0.45.. 2.3. Acid attack test. The 150x150x150mm concrete cube was casted, and kept in water for 28 days curing.

Based on IS 4031, the Vicat apparatus is used to test the consistency and setting time of concrete. Table 2 presented the summarized literature on eggshell concrete setting time. Generally, eggshell is an accelerator that reduces the setting time of cement (Ramathilagam et al., 2018; Freeda Christy et al., 2014; Afolayan and Sani, 2017).The …

These Reinforced Cement Concrete (RCC) & Prestressed Concrete (PSC) Study notes will help you to get conceptual deeply knowledge about it.We are here to provides you the Best Study Notes from Best coachings like Made easy, ACE academy etc.. and Lecture notes from best institutions like MIT (Open Course), IIT (NPTEL) Open Courses and …

In the past 100 years, concrete primarily composed of cement, sand, gravel, and water, has been the most commonly used man-made building material by virtue of its high strength, low cost, easily obtained raw materials [1], [2].One of the representative applications of concrete structures is the concrete drainage pipes.

scale geopolymer cement concrete components. This paper discusses mechanical characteristics of geopolymer cement concrete, quality of form finishes, strategies for curing, and challenges to full-scale production. Manufacture of full-scale geopolymer cement concrete components: A case study to highlight opportunities and challenges

When making a concrete cast, begin by mixing the concrete. Concrete is made by mixing cement, water, and an aggregate like sand or small pebbles. Once the concrete is made, pour it into a mold or ...

Muleya et al. made experimental study on RHA, which is used to make cement in small amounts, was used to test the integrity of concrete made in Zambia. The main objective was to evaluate the costs and benefits of using RHA in concrete. ... For example, it can be used as a partial replacement for cement in concrete to improve its …

This study employed a comprehensive experimental design to investigate cement concrete specimens subjected to typical temperature variations (20-60 °C) and different numbers of temperature differential cycling (0, 60, 120, 180, 240, 300). Axial compressive strength tests, ultrasonic tests, and compressive fatigue tests were …

The experimental findings include compressive strength (CS), flexural strength (FS) and split tensile. strength (STS) by partially cement replacement with Industrial IFA and PG employing 0 %, 5 ...

It has also been observed that graphene contributes to the formation of a dense cement stone structure, consisting primarily of low-basic calcium hydro-silicates, resulting in improved physical and mechanical characteristics of concrete and increased resistance to frost and other forms of aggression [13].Furthermore, research has …

A national study in Brazil showed that the waste material produced by concrete construction activities can be as high 50– of the mass of concrete used in the building, and highlighted that ...

GGBS is a finely powdered iron slag by-product of the steel-making industry. The mechanical characteristics of M40 grade concrete with partially replaced cement of 30%, 40%, and 50% by GGBS are examined in this study. All mix design specifications and material test data are carried out per IS codes, for a curing time of 7, 14, and 28 days ...