quality material processing for aggregate to cement

Novel separation process for obtaining recycled cement and high

2021.8.1 The liberation and separation methods described in this study aimed to obtain individualised hardened concrete constituents, waste cement paste and cleaner aggregate, envisioning their re-use as recycled cement and high-quality recycled fine

Performance Evaluation of Cement Stabilized Mixture with

2021.9.21 Cement stabilized aggregate base mixture is a heterogeneous material mixed with different materials, and its fatigue performance is affected by many factors

Enhancing the quality of recycled coarse aggregates by different ...

Novel separation process for obtaining recycled cement and high

2021.8.1 This paper describes a new patented method involving a mechanical comminution stage and a high-intensity magnetic separation process to obtain the

Innovative process routes for a high-quality concrete recycling

2013.6.1 This study aims to investigate the mechanical and durability performance of various cement concrete mixes prepared using 53-grade cement with various

Improving Recycled Aggregate Quality by Mechanical Pre

The goal of this study is to improve the strength of structural concrete with 53% and 100% CCA replacements without increasing the cement content. Thus, improvements in CCA

Materials Free Full-Text Improvement of the Quality

Materials Free Full-Text Current Applications of

2021.3.30 It defines the quality of the material and is important for proportioning concrete mixes and controlling several properties of the hardened recycled aggregate concrete . The recycled concrete

Recycled Aggregate: A Viable Solution for Sustainable Concrete ...

2022.7.30 Besides the CO 2 emission released by cement production, large amounts of sand and gravel are extracted to serve as aggregates—it is estimated that the natural

Recycled Aggregate: A Viable Solution for Sustainable Concrete ...

2022.7.30 1. Introduction. Concrete is the second most used material by volume on Earth. Portland cement is the main binder of concrete, and its production (estimated at 4.3 bi ton/year) accounts for about 8% of the global CO 2 emission [].Besides the CO 2 emission released by cement production, large amounts of sand and gravel are extracted to serve

Enhancing the quality of recycled coarse aggregates by different ...

2021.9.15 This paper reviews various treatments and processing techniques to improve the quality of ... (2020) Effect of surface treatment of recycled concrete aggregate by cement -silica fume ... “The influence of heat and mechanical treatment of concrete rubble on the properties of recycled aggregate concrete.” Materials. 12, 1 ...

A mathematical model to predict the porosity and compressive

2023.6.12 The purpose of this study is to explore how characteristics of pervious concrete, such as porosity and compressive strength, are affected by three factors: aggregate size, aggregate-to-cement ratio and compaction effort. The study used three aggregate sizes (5–12 mm, 12–18 mm and 18–25 mm), five different aggregate-to

Improving Recycled Aggregate Quality by Mechanical Pre-Processing

2020.9.29 the mechanical of. gravel or crushed rock—which. CCA. The quality. similar compressive. containing aggregates of crushed stone or gravel [2]. nd crushed rock [3]. A. and high water absorption ...

Materials Free Full-Text Production of Greener High-Strength

2020.12.7 Quartz sandstone (QS) is a mine waste; therefore, its use in construction allows for both reducing the cost of the concrete and contributing to the utilization of waste. The scientific originality of this study is the identification of models of the effect of QS aggregate on the physicomechanical, durability characteristics, and eco-safety of

What You Need to Know About the Quality of Cement

2018.2.1 4. Smell. If the cement has an earthy smell, it may contain too much clay and silt. 5. Strength. Form an 8 in. by 1 in. by 1 in. block and immerse it in water for seven days. Then place the block on supports that are about 6 in. apart and place under a 75 lb. load. The block should not show any signs of failure.

Applied Sciences Free Full-Text Feasibility of Developing ...

2020.7.6 Quarry aggregate reserves are depleting rapidly within Australia and the rest of the world due to an increasing demand for aggregates driven by expansion in construction. The annual production of premix concrete in Australia is approximately 30 million cubic meters, while 3–5% of concrete delivered to site remains unused and is

Crystals Free Full-Text Design Strategy for Recycled Aggregate ...

2021.6.17 Currently, a number of disadvantages hampers the use of recycled concrete aggregates (RCA). The current review proves that concretes made with complete replacement of natural aggregate with RCA allow the production of high-quality concrete. One of the possibilities for improving concrete properties with RCA is the use of extended

Fresh-state performance of recycled aggregate concrete: A review

2018.7.30 Abstract. This paper presents a literature review concerning the fresh properties of concrete containing recycled aggregates from beneficiated construction and demolition wastes. It starts with the identification of the main variables affecting the workability of concrete, such as the quality and moisture state of the recycled aggregates.

Materials Free Full-Text Improvement of the Quality of

2022.4.8 The main factor that alters the quality of recycled concrete aggregate (RCA) is the paste adhered to the natural aggregate (NA). Since it causes weakening of the interfacial transition zone (ITZ) between the aggregate and the cementitious paste, it becomes a determining factor for the mechanical behavior of concrete. It turns out that it

High-Durability Concrete Using Eco-Friendly Slag-Pozzolanic Cements

2020.11.23 Clinker production is very energy-intensive and responsible for releasing climate-relevant carbon dioxide (CO2) into the atmosphere, and the exploitation of aggregate for concrete results in a reduction in natural resources. This contrasts with infrastructure development, surging urbanization, and the demand for construction

Use of Recycled Concrete Aggregates in Production of Green Cement

2021.2.26 In fact, all types of aggregate produced of broken concrete are a composite material consisting of natural aggregate and cement mortar (See Figure 22, Figure 23, Figure 24, Figure 25 and Figure 26). These broken parts use to completely or partially replace natural aggregates after crushing to small particles [ 164 ].

Sustainability Free Full-Text Development of Concrete Mixture ...

2020.10.1 The development of a concrete mixture design process for high-quality concrete production with sustainable values is a complex process because of the multiple required properties at the green/hardened state of concrete and the interdependency of concrete mixture parameters. A new multicriteria decision making (MCDM) technique

Health Risk and Environmental Assessment of Cement Production

2021.8.30 The cement manufacturing industry has played a fundamental role in global economic development, but its production is a major facilitator to anthropogenic CO2 release and solid waste generation. Nigeria has the largest cement industry in West Africa, with an aggregate capacity of 58.9 million metric tonnes (MMT) per year. The Ministry

Assessing the Quality of Sandstones for Use As Aggregate in

Volume 64 Issue 12. Assessing the quality of sandstones for. use as aggregate in concrete. and successive measurements were taken after 7, 14, 16 and 21. days. The percent linear expansion of ...

Performance Evaluation of Cement Stabilized Mixture with

2021.9.21 2.2 Large-Scale Processing Technology of Construction Waste Recycled Aggregate. To obtain high-quality construction waste recycled aggregates, the large-scale production was achieved, the effect that the comprehensive utilization of construction waste has multiple effects of environmental friendliness, obvious economic and social benefits

Methods to improve microstructural properties of recycled concrete ...

2020.11.1 Recycled concrete aggregate is a demolition concrete waste, which could be an environmental-friendly building material and can be a serious contender for saving natural aggregate and reducing ...

Buildings Free Full-Text Performance Improvement of Recycled

2023.5.30 As illustrated in Figure 1, high-quality RCA can be used in ready-mixed or precast concrete, while separated fine/powdered mortar can be used as a cement-replacement material. Typically, RCA comprises a virgin aggregate and adhered mortar, and the old adhered mortar exhibits a loose and porous character [ 6 , 7 ].

Egyptian code standards requirements for aggregate mixtures.

Download Table Egyptian code standards requirements for aggregate mixtures. from publication: Utilization of cement treated recycled concrete aggregates as base or subbase layer in Egypt ...

Enhancement Treatment of Recycled Concrete Aggregate

2021.7.22 Aggregate is an essential component in concrete, occupying 60–70% of the concrete by volume. Nevertheless, the application of natural aggregate (NA) is restricted due to the finite resources and long regeneration period. Recycled concrete aggregate (RCA), as common CD waste, has received widespread attention for its usage to