Smart materials and technologies for sustainable concrete …
This paper presents a comprehensive review of current trends and opportunities for sustainable concrete construction, emphasizing the importance of …
High Quality Secondary Concrete Impact
Crystals | Free Full-Text | High-Durability Concrete with …
Durability of concrete is of great significance to prolong the service life of concrete structures in corrosive environments. Aiming at the economical and environment-friendly production of concrete by comprehensive utilization of the supplementary cementitious materials made of industrial byproducts, the resistances to …
Innovative technologies for recycling End-of-Life concrete …
Current crushing trends include a combination of jaw crushers and secondary impact crushers ... The development of both ADR and HAS technologies to leverage EoL concrete waste into high quality recycled coarse and fine aggregates, comes at competitive price. The mobility (transportability) of these technologies enables …
Comprehensive investigation of the durability and …
Today, concrete is the most widely used building material. Cement production releases about 7% of carbon dioxide gas into the atmosphere and increases greenhouse gases, so it seems necessary to use an alternative to Portland cement. In recent years, geopolymers have been considered a suitable and environmentally friendly …
Secondary curing effect on the hydration of ultra-high performance concrete
1. Introduction. Ultra-high performance concrete (UHPC) can significantly improve structural durability because of its very dense microstructure [1], [2], [3].In addition, the properties of UHPC achieve similar structural performance through a smaller section than normal-strength concrete, so that the overall weight of the UHPC-based structure …
Sustainable 3D printed concrete structures using high …
Within this context, this chapter delves into the potential of sustainable 3D printed concrete structures through the utilization of high-quality secondary raw …
Sustainable 3D printed concrete structures using high-quality secondary …
This chapter offers a comprehensive summary of prior research endeavors focused on integrating high-quality secondary raw materials into 3DCP, with a specific emphasis on secondary supplementary raw materials, recycled aggregates, recycled fibers, and waste materials in the context of geopolymer concrete.
Ultra-High-Performance Concrete (UHPC): A State-of-the …
The interest of researchers in UHPC has increased over the past decade. It is crucial to understand the structural behavior of reinforced UHPC (R/UHPC) components under various loading conditions before they can be used as a replacement for conventional concrete. Although several studies on ultra-high-performance concrete (UHPC) have …
Secondary Impact Crushers
They are particularly effective in producing high-quality aggregate that is both consistent and well-graded, essential for concrete and asphalt applications. Secondary impact …
Sustainable use of different wastewater in concrete …
Concrete setting time is calculated by using the Vicat Needle apparatus according to various specifications like IS 4031 (1988), ASTM C403, and EN-197 part 1 (2000) requirements. According to Terro and Al-Ghusain [42], concrete made from primary, secondary, and tertiary treated wastewater has a major impact on the setting time. The …
A comprehensive review of ultra-high performance concrete …
As illustrated in Fig. 1, differing from the composition of conventional concretes like normal strength concrete (NSC) and high strength concrete (HSC), UHPC employs the maximum densified particle packing theory [1].This theory eliminates the use of coarse aggregates and instead combines particles of varying sizes in optimal …
Concrete aggregates properties crushed by jaw and impact …
This paper compares the use of jaw and impact secondary crushing for producing coarse recycled aggregates from concrete wastes, obtained from road …
Intelligent real-time quality control for 3D-printed concrete …
For the secondary near-nozzle mixing, the pre-mixed fresh concrete with a high flowability was secondarily mixed with a rheological modifier in the near-nozzle mixer to form printable concrete with a short setting time [15,16] (Fig. 1(c)).
Concrete aggregates properties crushed by jaw and impact secondary …
This paper compares the use of jaw and impact secondary crushing for producing coarse recycled aggregates from concrete wastes, obtained from road pavement and demolished building materials.
SECONDARY TREATED WASTEWATER AS A CONCRETE …
Kucche et al. [18] reviewed the impact of the mix-up water quality on concrete production. Examining the permissible thresholds of different impurities, that mixing water could contain and
Production of an eco-friendly concrete by including high …
From the performed review, it can be concluded that the usage of pozzolanic high-volume SCMs is an effective way to reduce the OPC content in concrete, causing a significantly positive impact to ...
High‐performance concrete with fine recycled concrete …
High-performance concrete (HPC) is a cement-based material with excellent properties and durability which determines high-level structural utilization. ... the necessity of high-quality natural resources such as quartz powder and sand and a high amount of cement and silica fume and reinforcement by fibers causes a high …
Sustainable 3D printed concrete structures using high-quality secondary …
Within this context, this chapter delves into the potential of sustainable 3D printed concrete structures through the utilization of high-quality secondary raw materials. It examines these materials from multiple angles, considering their properties and characteristics that can be integrated into 3DCP.
Wastewater utilization for concrete production: Prospects, …
Halawa and Al-sheikh [17] investigated the impact of different types of wastewater on concrete strength, including primary, secondary, tertiary treated wastewater, and treated grey water. The results showed that the tensile strength was increased by 11.5% when using tertiary treated wastewater, while it decreased by …
Teacher Salaries and the Shortage of High-Quality Teachers …
Abstract. Teacher salary level and structure are not only important factors affecting the supply of primary and secondary school teachers, but they are also crucial to attracting, training, and retaining high-quality teachers, thereby impacting the overall quality of education and teaching in schools.
Properties and performance of polypropylene fibered high …
A composite binder was obtained by mixing cement, superplasticizer and polymineral modifier components ground using vibratory mill at definite surface area of 500 m 2 /kg. PM addition was 1%, 3%, 5% and 7% by weight of cement (Fig. 2).Optimal binder composition comparison and identification, mixtures were prepared with the ratios of the …
Climate and health damages from global concrete production
Concrete is the world's most widely used man-made material, with consumption growing exponentially as populations and incomes rise 1,2,3.Concrete's popularity, which stems from its low cost ...
Secondary Treated Wastewater as a Concrete Component and its Impact …
In the present work, secondary treated wastewater (STW) and potable water (PW) were used in the production of concrete mixes, which were subjected to testing after 3 to 28 days of curing to ...
Deformation failure and acoustic emission response
1. Introduction. With the construction and development of infrastructure such as highways, bridges, tunnels, and high-speed railways, concrete has become a widely used building material in various engineering fields due to its high compressive strength, easy construction, and good durability [1], [2].When the vehicle passes through, it will …
TIEDAO high quality Brushless Electric Drill Professional Wood Concrete …
TIEDAO high quality Brushless Electric Drill Professional Wood Concrete Steel Drilling impact drill, You can get more details about TIEDAO high quality Brushless Electric Drill Professional Wood Concrete Steel Drilling impact drill from mobile site on Alibaba.com
Concrete aggregates properties crushed by jaw and impact secondary
Minor observed differences do not justify the common belief in the industry that impact crushers provide an improvement in the quality of recycled aggregates due to the higher detachment of cement paste from aggregates. Keywords: Recycled concrete aggregate, Liberation comminution, Recycled aggregate properties, Impact crusher, Jaw crusher
Effect of secondary curing on the performance of microwave cured concrete
DOI: 10.1016/j.conbuildmat.2022.127256 Corpus ID: 247737358; Effect of secondary curing on the performance of microwave cured concrete @article{Zhou2022EffectOS, title={Effect of secondary curing on the performance of microwave cured concrete}, author={Feifei Zhou and Ganghua Pan and Haining Meng and Renjie Mi}, …
Secondary Treated Wastewater as a Concrete Component and Its Impact …
In the present work, secondary treated wastewater (STW) and potable water (PW) were used in the production of concrete mixes, which were subjected to testing after 3 to 28 days of curing to determine how the, mechanical properties of concrete was affected by the addition of secondary treated wastewater in various proportions (25-).
Teachers can change the world: Scaling quality teacher
The second issue is slightly easier to undertake: the need to design and deliver high-quality teacher professional development (TPD) to all teachers in ways that allow them to grow and learn more ...
Smart materials and technologies for sustainable concrete …
1. Introduction. Concrete is a sustainable and versatile construction material which can produce structures that last for thousands of years. Due to the many areas of application, concrete is the second most consumed material on Earth, only after water, with a global production of around 4.1 billion tons of cement in 2021 (Statista, 2023), and an …
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