Nigeria is rich is solid mineral resources, such as: Kaolin, gypsum, mica, clay, tantalite, iron ore, gemstone, silica sand.
Read More
Recycling concrete &building rubble is not only able to bring profit to investors, but also good for environment protection.
Read More
By absorbing the advanced technology from the world, we researched and designed PF series impact crusher.…
Read More
Base on the plentiful experience of producing and marketing of impact crusher, Sofol R&D institution…
Read More
Adopting technology from the world, PY Series spring cone crusher has an excellent performance in secondary…
Read More
The vibrating screen is a kind of sieving equipment of international advanced level, developed by our…
Read More
Sofol VSI Series vertical shaft impact crusher is designed by reputed German expert of Sofol and every…
Read More
The 60-story Nations Bank Building in North Carolina, United States used presoaked expanded shale lightweight aggregate in 117 mm thick slabs that were supported on posttensioned concrete beams at 3.0 m centers. The lightweight concrete floor system was used to minimize dead weight and to achieve a 3-hour fire rating.
Details
To assess the effects of cement content on the properties of lightweight concretes, the. mixtures are made by three cement co ntents of 500, 420 and 350 kg/m. For the mixes, slumps were nearly 50 ...
Details
The material studied in the following is a structural lightweight concrete with an ultra-high-performance matrix and expanded glass as a lightweight aggregate. The material, with a compressive strength of 60–100 MPa and a bulk density of 1.5–1.9 kg/dm3, showed high capillary porosities of 12 vol% (ultra-high-performance concretes (UHPC) < 5 ...
Details
Share. Lightweight concrete is a mixture made with lightweight coarse aggregates. Low-weight aggregates such as shale, clay, shale, slate, volcanic pumice, ash, or perlite are used to reduce the density. Lightweight concrete is a special type of concrete made to be used for special purposes. It is not commonly used as normal …
Details
GUIDE FOR STRUCTURAL LIGHTWEIGHT-AGGREGATE CONCRETE (ACI 213R-14) four piers (~13 ft [4 m] cubes) extending into the sea. For two millennia the piers have withstood the forces of nature with only surface abrasion. They became obsolete only because of siltation of the harbor.
Details
Structural Performance of High Strength Lightweight Concrete Pretensioned Bridge Girders. B. Cross. Engineering, Materials Science. 2012. The use of high compressive strengths in prestressed bridge girders can lower costs by allowing for longer spans, increased girder spacing, and smaller cross-sections.
Details
This guide includes a definition of lightweight-aggregate concrete for structural purposes and discusses, in a condensed fashion, the production methods for and inherent properties of structural lightweight aggregates. Current practices for proportioning, mixing, transporting, and placing; properties of hardened concrete; and the design of ...
Details
1. Introduction. Lightweight ed concrete (LFC) is a cellular material composed of cement–sand matrix enclosing a large number of small pores roughly 0.1–1.0 mm size, uniformly distributed in either a matrix of aggregate and cement paste or cement paste alone.The essential advantage of LFC to the field of concrete technology is the …
Details
The structural response of CNT reinforced high-strength lightweight concrete (HSLC) beams was investigated considering specimen size, tensile reinforcement ratio, and stirrup spacing. As the tensile reinforcement ratio increased from 0.008 to 0.019, yielding and peak load of specimens improved by 92% and 73%, respectively.
Details
Ultra High Performance Concrete (UHPC) Ultra-High Performance Concrete (UHPC) is a cementitious, concrete material that has a minimum specified compressive strength of 17,000 pounds per square inch (120 MPa) with specified durability, tensile ductility and toughness requirements; fibers are generally included in the mixture to achieve specified …
Details
The results revealed the optimal mix ratio of OPC: FA: SF: PS: HGM =1: 0.200: 0.133: 0.533: 0.067, a water-binder ratio of 0.16, and the volume ratio of steel fibers of 2%. Under steam curing at ...
Details
The basic aim of this research is to study the production and the performance of structural lightweight concrete using pumice stone (PS)as a different replacement of coarse aggregate (25%, 50%, 75 ...
Details
61 water reducer, structural high strength lightweight aggregate concrete (HSLAC) could be produced, 62 which typically exhibits compressive strength higher than 40 MPa and density less than 2000 ...
Details
This paper aims to use lightweight aggregates to design ultra-high-performance lightweight concrete (UHPLC) via modified Andreasen and Andersen (MAA) model, which is promising to solve the issues on the high density of ultra-high-performance concrete and thus benefits its application in high-rise and long-span …
Details
High performance lightweight aggregate concrete has become a popular topic for the development of green concrete due to the incorporation of industrial waste, e.g., fly ash and boiler slag for ...
Details
WHAT is Structural Lightweight Concrete? Structural lightweight concrete has an in-place density (unit weight) on the order of 90 to 115 lb/ ft3 (1440 to 1840 kg/m3) compared to normalweight concrete with a density in the range of 140 to 150 lb/ ft3 (2240 to 2400 kg/m3). For structural applications the concrete strength should be greater than ...
Details
The success in developing lightweight concrete with sufficient strength properties by Hamad [13], Evangelista & Tam [14], Hung et al. [15], Liu et al. [16] and Ibrahim et al. [17] or exceptionally ...
Details
1 INTRODUCTION 1.1 Self-compacting lightweight concrete. Concrete is the main production for recycling waste materials and cleaning the climate. The utilization of self-consolidating lightweight concrete (SCLWC) can achieve two important advantages of the structure self-weight reduction and improving workability. 1 The SCLWC is highly …
Details
Concrete technology has developed in a new way to overcome conventional concrete limitations such as self-compact concrete (SCC), high-performance concrete (HPC) and ultra-high performance concrete (UHPC) [1, 2].For the structural application of conventional concrete, two primary weaknesses have caused issues: weakness …
Details
Lightweight concrete. T.W. Bremner, in Developments in the Formulation and Reinforcement of Concrete, 2008 8.1.1 Terminology. The term " lightweight concrete " which is preferred by the American Concrete Institute (ACI) will be used rather than the more scientifically correct term of lower density concrete (1).The Institute also defines …
Details
This results in a cellular, lightweight concrete. High carbon ash, recycled aluminum waste and zeolite powders are additional mechanical structures suitable in the production of cellular lightweight concrete. These cells may account for up to 80% of the total volumne. Weight of the concrete mixtures range from 220 kilograms per cubic meter [l4 ...
Details
Structural lightweight concrete is preferably produced in a compulsory mixer. If possible, the mixer blades should have a plastic lining in order to avoid unnecessary crushing of the LWA, especially in the case of very light LWA. In concrete plants, up to 5–10% of the very light coarse LWA can be crushed.
Details
High Performance Lightweight Aggregate Concrete', International Symposium on Structural Lightweight Aggregate Concrete, No. 2, pp. 548-561. 20.IQS No: 5, 1 984"Characteristics of OPC" Central ...
DetailsAccording to DIN 1045-1, structural lightweight concrete is defined as having a density of less than 2000 kg/m 3, and the use of WCB helped produce this type of concrete. Therefore, after comparing it with the existing lightweight concrete in the market, it was found that WCB can be used to produce sustainable lightweight …
Details
1. Introduction. Lightweight concrete has low density and is adaptable for. construction of buildings in low-seismic zones. Structural. seismic responses are based on mass of the structure or dead ...
Details
Structural Concrete is a structural engineering journal publishing research on all aspects of concrete structures, ... the properties of ultra-high-performance concrete (UHPC) have been widely investigated. ... Steel fiber and ceramsite sand worked together to make up for the lack of lightweight porous aggregate so that even when …
Details
Currently, researchers emphasize creating eco-friendly, ultra-high-performance lightweight concrete (UHPLC) due to the extensive cement demand of ultra-high-performance concrete. This study aimed to develop such UHPLC by incorporating dehydrated cement powder (DCP) and aerogel (AG) at varying levels (5-25%) alongside …
Details
ACI 213 definition of structural-grade lightweight concrete that has an equilibrium dry density ranging between 90 to 115 lb/ft³. 4. Absorption. Studies have revealed that high-quality lightweight concretes absorbed very little water and thus maintained their low density. The permeability of lightweight concrete was extremely low and generally ...
Details
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 …
Details
This study proposed high-performance ultrasonic transducers for concrete structure health monitoring. The main contribution of performance improvement comes from two aspects based on the component analysis of the traditional SAs. The first one is the surface treatment on the PZT patch, which can also be considered as changing the …
Details
The structural lightweight concrete (LWC) has emerged from the early 20th century. Keeping an acceptable level of strength, lightweight concrete; relative to normal weight concrete; (a) reduces the horizontal inertia actions on structures in seismic regions (Sari and Pasamehmetoglu 2005), (b) has a favorable effect on the foundations of …
Details
For structural application, Mydin et al. and Prabha et al. investigated the compression performance of a load-bearing wall system with lightweight ed concrete infilled in double-skin profiled steel sheeting. However, the compressive strength of the ed concrete was so low (around 6–8 MPa) that it had limited application in …
Details
steel bers, and 0.25% polypropylene bers, and 0.5% of 60 mm long steel bers and 0.25% polypropylene bers compared to. control beams without bers. Moreover, a 7% increase in load capacity was ...
Details
The structural efficiency of high-performance PP0.5-PP1.3 LWAC was between 19.5 and 21.5 MPa/tm −3 and ST0.5-ST2.5 was between 20.5 and 22.0 MPa/tm −3 as ... The compressive strength and density of all the fibre-reinforced LWAC fall into the structural lightweight concrete class 13–88 MPa in BS EN206-1 with a density of less …
Details
This paper aims to provide an in-depth review of HSLWC, covering its development strategies, functional and durability properties, and structural applications. Particular emphasis is given to the emerging technology of ultra high-performance lightweight concrete, characterized by low density, ultra high strength and superior …
DetailsSandwich panels comprising prefabricated ultra-high performance concrete (UHPC) composites can be used as eco-friendly and multi-functional structural elements. To improve the structural and thermal performance of composite sandwich panels, combinations of UHPC and expanded polystyrene (EPS) beads were …
Details
Introduction. Expanded polystyrene (EPS) is derived from styrene monomers infused with blowing agents such as pentane and hexane gases to produce spherical-shaped lightweight particles having a density hovering from 10 to 50 kg/m 3.The closed-cell beads are characterized by very low water absorption and high resistance to heat …
Details
Semantic Scholar extracted view of "High-performance structural lightweight concrete with cement paste coated aggregates" by H. Müller et al. ... {Mller2001HighperformanceSL, title={High-performance structural lightweight concrete with cement paste coated aggregates}, author={Harald S. M{"u}ller and Vladislav Kvitsel and Ulf Guse}, …
Details
Effect of lightweight aggregates prepared from fly ash on lightweight concrete performances. S. Punlert P. Laoratanakul R. Kongdee R. Suntako. Materials Science, Engineering. 2017. Lightweight aggregates were prepared from fly ash of by-products from the paper industry. The influence of the ratio of clay to fly ash and …
Details
Sofol is a well-known crusher and grinding mill manufacturer that offers equipment and solutions for customers from aggregates, mining and mineral grinding industry.
You can leave your message here, we'll send you an Email immediately.
Online ChatCopyright ©2000- 2024 Shanghai Sofol CompanySitemap
PE series jaw crusher is usually used as primary crusher in quarry production lines, mineral ore crushing plants and powder making plants.
GET QUOTE