The physical and chemical impact of manufactured sand as a
In this research, the physical and chemical impacts of a locally available manufactured sands (MS) on the properties of Ultra-High Performance Concrete (UHPC) The chapter focuses on special high-performance concrete with manufactured sand, which can resist the vehicle-bridge vibration and underwater Special High-Performance Concrete with Manufactured Sand
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Influence of manufactured sand’s characteristics on its concrete
Manufactured sand (MS) is widely considered as an alternative of the river sand (RS) recently, and to clarify the influence significance and influence mechanism of The microstructure of manufactured sand ultra high strength concrete is very dense and the sizes of the hydration products e.g. ettringite, calcium hydroxide and Mixing design and microstructure of ultra high strength concrete
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Intelligent design and manufacturing of ultra-high performance concrete
As an advanced cement-based materials, ultra-high performance concrete (UHPC) breaks the performance upper limit of traditional concrete materials, which has First, the cement, admixture and fine aggregate (manufactured sand particle size be-low 4.75 mm) were dry-mixed for 1 min. Second, the mixture of water Study on the Strength and Microcosmic Characteristics
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Research on carbon emission reduction of manufactured sand concrete
Manufactured sand is accompanied by carbon emissions from production to use. This study regarded this process as the process of manufactured sand from 5.5.1 Mix Design Principle of High-Performance Concrete with Manufactured Sand Based on Aggregate Shape. From the point of view of workability, Mix Design of Concrete with Manufactured Sand SpringerLink
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Introduction SpringerLink
The high performance of sustainable concrete refers to high workability, strength, and durability. Among them, high durability can reduce the consumption of A demand for high strength concrete in the construction industry has led to the development of ultra-high performance concrete (UHPC), also known as reactive powder concrete [20], [14], [10], [13], [12], [29], [32]. UHPC is characterised primarily by its high strength and when reinforced with steel fibres, high material ductility.Manufacturing ultra-high performance concrete utilising conventional
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A review on strength development of high performance concrete
Metakaolin: MK is observed as one of the most quality enhancing SCMs in both high strength and high performance concretes [26] and can improve the strength of concrete [27] owing to its ability to transform portlandite into C-S-H gel by means of pozzolanic reaction [28].It was found that 5 wt% replacement of OPC by MK led to 6.56% Ultra-high-performance concrete and uses quartz sand as the fine aggregate. However, as a non-renewable mineral resource, the large use of quartz sand will not only lead to the high price of UHPC, but also has adverse effects on the environment, hence, researchers are trying to use natural sand or artificial sand to replace quartz sand Ultra-high performance concrete: Mix design, raw materials
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Review paper on material properties of high performance concrete
Moreover there are three main groups which are important in manufacture of high performance concrete they are increase of workability, increase of strength and increase of durability. Zaitri R. et al 2014 Development of high performances concrete based on the addition of grinded dune sand and limestone rock using the mixture designDune sand: Due to the high content of fine quartz, dune sand improves fluidity, mechanical properties and durability of UHPC. Specifically, the compressive and flexural strength is 3–4 times as the high-performance concrete strength, and the shrinkage is also within the acceptable range to resist the corrosion of chloride ions.Ultra-high performance concrete: Mix design, raw materials
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(PDF) AN INNOVATION OF HIGH PERFORMANCE CONCRETE BY REPLACING CEMENT
This research studied the effect of nickel-based cement substitution in concrete to analyze its behavior. The percentage of substituted nickel-slag was 10%, 20% and 30% to the cement weight.1. Introduction. Reducing waste and ensuring the long-term viability of building materials have become pressing concerns in the environmental community [1].The construction industry relies heavily on concrete [2], [3] and has excellent compressive strength (f c) [4].In recent decades, one of the most popular concrete types is ultra-high performance Using a combination of industrial and agricultural wastes to
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Precise mix-design of Ultra-High Performance Concrete
The quick rise of intelligent technologies promotes the development of the construction industry into a new phase. As an advanced cement-based materials, ultra-high performance concrete (UHPC) breaks the performance upper limit of traditional concrete materials, which has also been empowered by intelligent techniques.Moreover, the replacement percentage increases the percentage difference up to 3.38%, 3.76% and 11.86%, respectively than natural sand strength (13) . In (15) studied, Msand (30% and 50%(PDF) EFFECT OF MANUFACTURED SAND AS A REPLACEMENT
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Feasibility of manufacturing ultra-high performance cement
The use of recycled sand (RS) from construction and demolition (C&D) waste to produce ultra-high performance concrete (UHPC) is a promising but challenging methodology for low-carbon technology innovation. In this study, an economic and effective approach to optimize the performance of recycled sand UHPC (RSUHPC) is developed.Abstract. This paper presents a state-of-the-art review of the utilization of nanomaterials in ultra-high-performance concrete (UHPC). First, various types of nanomaterials currently available for use in UHPC are summarized and their geometric and physical properties are analyzed. Then, the effects of nanomaterials on the packing Nanomaterials in ultra-high-performance concrete (UHPC)
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(PDF) Recycled Aggregates (Recycled Sand) From High-Performance
This study highlights the effects of substitution of natural aggregates by recycled aggregates (30% sand and gravel 25%, 50%, 100%) on the mechanical resistance of recycled high-performance concrete.UHPC is produced with a low water/cement (w/c) ratio, which typically ranges between 0.15 and 0.25 [18].Given the low water content, superplasticizer agents are required to improve the packing of the composite material’s particles, which results in increased fluidity and workability of the mixture [19].In most UHPC manufacturing Recent trends in ultra-high performance concrete (UHPC):
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(PDF) Mix Design of High-performance Concrete
Abstract and Figures. A mix design procedure for high-performance concrete mixes has been presented in this paper. Since rheological parameters and compressive strength are fundamental propertiesThis study investigates the feasibility of establishing an environmentally sustainable ultra-high performance concrete from seawater and sea sand (SWSS-UHPC) which utilizes industrial byproducts (i.e., ground slag and silica fume) by partially substituting ordinary Portland cement (OPC). Several SWSS-UHPC trial mixes were prepared with Environmental Sciences Proceedings Free Full-Text MDPI
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Rheological and Mechanical Properties of Ultra-High-Performance
The manufacturing process of ultra-high-performance concrete (UHPC) leads to a considerable amount of greenhouse gas emissions, which contribute to global warming. Using recycled concrete aggregates (RCA) to replace natural sand helps to reduce natural resources and energy consumption. In this study, the feasibility of manufacturing 2. Modern concrete and UHPC evolution2.1. Traditional production. Modern concrete began with sand and different sizes of gravel, which were mixed in the presence of water with the great binding material, Portland cement, which binds all aggregates together into stone-like material [4].Portland cement was invented by Joseph Aspdin in 1824; it is UHPC evolution, development, and utilization in
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Mix design and performance of lightweight ultra high-performance concrete
Central Composite Design method was effective in designing novel lightweight ultra high-performance concrete (L-UHPC). • The L-UHPC prepared with micro-sized glass microsphere and lightweight aggregates had ultra high strength (>120 MPa) and low density (<1950 kg/m 3).. The developed L-UHPC had excellent structural efficiency, While concrete production accounts for significant CO 2 emissions and natural resources (e.g., river sand and freshwater) depletion, the incorporation of sea sand, seawater, and industrial by-products in ultra-high-performance concrete (UHPC) manufacture could offset such impacts. However, the transport and durability The mechanical, transport and chloride binding
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Gels Free Full-Text A Study on the Cement Gel Formation
One of the most science-intensive and developing areas is nano-modified concrete. Its characteristics of high-strength, high density, and improved structure, which is not only important at the stage of monitoring their performance, but also at the manufacturing stage, characterize high-performance concrete. The aim of this study is to
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