Mechanical properties and impact resistance of a high-strength lightweight concrete incorporating prickly pear fibres

2020 ◽  
Vol 262 ◽  
pp. 119972
Author(s):  
Abderraouf Trabelsi ◽  
Zied Kammoun
Keyword(s):  
Mechanical Properties ◽  
Lightweight Concrete ◽  
Impact Resistance ◽  
High Strength ◽  
Prickly Pear

Lightweight Concrete Based on Gypseous Binding Materials, Modified with Microcrystalline Cellulose, and Cavitationly Processed Sawdust

2019 ◽  
Vol 945 ◽  
pp. 188-192 ◽  
Author(s):  
A.A. Pykin ◽  
E.Y. Gornostaeva ◽  
N.P. Lukutsova ◽  
J.S. Pykina
Keyword(s):  
Mechanical Properties ◽  
Microcrystalline Cellulose ◽  
Lightweight Concrete ◽  
Physical And Mechanical Properties ◽  
High Strength ◽  
Water Soluble ◽  
Waste Wood ◽  
Matrix Microstructure ◽  
Calcium Sulfate Dihydrate ◽  
Reducing Substances

The physical and mechanical properties of lightweight constructional heat-insulating concrete (sawdust gypsum concrete) with high-strength gypsum binder, modified by food cotton microcrystalline cellulose and organic fillers of plant origin from the waste wood of coniferous and deciduous species in the form of cavitationly processed pine and birch sawdust have been studied. The dependence of the cavitation extraction time of water-soluble reducing substances (sugars) from sawdust on the strength of sawdust gypsum concrete is established. The changes in microstructure of the gypsum matrix, the mean density, bending tension strength and compression strength, the thermal conductivity coefficient of sawdust gypsum concrete on the basis of the cavitationly processed sawdust with the introduction of microcrystalline cellulose are analyzed. It is proven that microcrystalline cellulose compacts the space between the crystalline hydrates of calcium sulfate dihydrate in the gypsum matrix microstructure and improves the physical and mechanical properties of sawdust gypsum concrete.

Microstructure-Mechanical Properties Correlations in Composite Grid Structures

2013 ◽  
Vol 668 ◽  
pp. 630-634
Author(s):  
Xai Mei Lu ◽  
Yun Fei Ma
Keyword(s):  
Mechanical Properties ◽  
Impact Resistance ◽  
High Strength ◽  
Light Weight ◽  
Load Testing ◽  
Mechanical Behaviors ◽  
Grid Structure ◽  
Unit Cells ◽  
Composite Grid ◽  
Energy Absorbing

The composite grid structure, which is highly efficient and strongly designable, posses a variety of excellent performances， such as light weight, high strength, and inherent impact resistance. This paper used experimental methods to investigate the composite grid structure consisting of quadrilateral unit cells. The authors made nine specimens composed of different unit-cell sizes of the grid structure, through a series of static and dynamic load testing on them, examined and further analyzed their mechanical behaviors and energy-absorbing capabilities, as well as compared their mechanical properties, thus found specific (new) correlations between microstructures and mechanical properties in composite grid structures.

Effects of polypropylene twisted bundle fibers on the mechanical properties of high-strength oil palm shell lightweight concrete

2015 ◽  
Vol 49 (4) ◽  
pp. 1221-1233 ◽  
Author(s):  
Ming Kun Yew ◽  
Hilmi Bin Mahmud ◽  
Payam Shafigh ◽  
Bee Chin Ang ◽  
Ming Chian Yew
Keyword(s):  
Mechanical Properties ◽  
Oil Palm ◽  
Lightweight Concrete ◽  
High Strength ◽  
Palm Shell ◽  
Oil Palm Shell ◽  
Twisted Bundle

Mechanical Properties of Modified Polypropylene Coarse Fiber-Reinforced, High-Strength, Lightweight Concrete

2011 ◽  
Vol 374-377 ◽  
pp. 1499-1506
Author(s):  
Rong Hui Zhang ◽  
Jian Li
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Lightweight Concrete ◽  
Volume Fraction ◽  
High Strength ◽  
Lightweight Aggregate Concrete ◽  
Fiber Reinforced ◽  
Fiber Volume

In this study, the effect of micro-expansion high strength grouting material (EGM) and Modified polypropylene coarse fiber (M-PP fiber) on the mechanical properties of lightweight concrete are investigated. The influence of EGM and M-PP fiber on compressive strength , flexural strength and drying shrinkage of concrete are researched, and flexural fracture toughness are calculated. Test results show that the effect of EGM and M-PP fiber volume fraction (Vf) on flexural strength and fracture toughness is extremely prominent, compressive strength is only slightly enhanced, and the rate of shrinkage is obviously decreased. It is observed that the shape of the descending branch of load-deflection and the ascending branch of shrinkage-age tends towards gently with the increase of Vf. And M-PP fiber reinforced lightweight aggregate concrete is more economical.

scholarly journals Effects of Low Volume Fraction of Polyvinyl Alcohol Fibers on the Mechanical Properties of Oil Palm Shell Lightweight Concrete

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Ming Kun Yew ◽  
Hilmi Bin Mahmud ◽  
Bee Chin Ang ◽  
Ming Chian Yew
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Polyvinyl Alcohol ◽  
Oil Palm ◽  
Lightweight Concrete ◽  
Volume Fraction ◽  
High Strength ◽  
Palm Shell ◽  
Oil Palm Shell ◽  
Low Volume

This paper presents the effects of low volume fraction(Vf)of polyvinyl alcohol (PVA) fibers on the mechanical properties of oil palm shell (OPS) high strength lightweight concrete mixtures. The slump, density, compressive strength, splitting tensile strength, flexural strength, and modulus of elasticity under various curing conditions have been measured and evaluated. The results indicate that an increase in PVA fibers decreases the workability of the concrete and decreases the density slightly. The 28-day compressive strength of oil palm shell fiber-reinforced concrete (OPSFRC) high strength lightweight concrete (HSLWC) subject to continuous moist curing was within the range of 43–49 MPa. The average modulus of elasticity (E) value is found to be 16.1 GPa for all mixes, which is higher than that reported in previous studies and is within the range of normal weight concrete. Hence, the findings of this study revealed that the PVA fibers can be used as an alternative material to enhance the properties of OPS HSLWC for building and construction applications.

Experimental Research on Mechanical Properties of ALC Wallboard

2011 ◽  
Vol 368-373 ◽  
pp. 423-427
Author(s):  
Yan Min Yang ◽  
Yi Ran Zhang
Keyword(s):  
Mechanical Properties ◽  
Experimental Research ◽  
Lightweight Concrete ◽  
Steel Wire ◽  
Impact Resistance ◽  
Wall Material ◽  
Composite Sandwich ◽  
Practical Engineering ◽  
Bending Capacity ◽  
Building Wall

The new building wall material solid composite sandwich panel consists of panel and inserted layer material-steel wire nets of composite light bar, and it is called ALC ( Autoclaved Lightweight Concrete) wallboard. The transportation, installation of ALC wallboard is required to meet certain strength requirement, and the wallboard can carry the aseismatic behavior and the bending capacity when it is laid into the wall. Therefore, in order to ensure the ALC wallboard can be better applied in practical engineering, the experimental research need to be done on the wallboard mechanical properties, such as impact resistance, hanging force, bending resistance, etc.

Effect of austenitizing and tempering on impact resistance of a hot rolled high strength steel

2021 ◽  
Vol 21 (1) ◽  
pp. 15-19
Author(s):  
Haider Mahdi Lieth ◽  
Ali Sabea Hammood
Keyword(s):  
Mechanical Properties ◽  
High Strength Steel ◽  
Impact Resistance ◽  
High Strength ◽  
Metallographic Analysis ◽  
Ballistic Performance ◽  
Tempering Temperature ◽  
Quenching Medium ◽  
Hot Rolled ◽  
The Impact

The aim of this study is to investigate the effect of heat treatments on the impact properties of hot rolled high strength steel and describes the effect of tempering temperature and quenching media on the microstructure, hardness, and impact resistance of plates. In the present study a high strength steel was austenitized at 900 °C with different quenching medium and followed by tempering at 300 °C, 500 °C. After thermal treatments, the values of Charpy impact resistance, hardness, and microscopic structure were evaluated from mechanical and metallographic analysis of metals respectively. The change of mechanical properties and microstructure of the metal with the existence of heat treatment with the ballistic performance of high-strength steel. Experimental results showed that tempering at 500 °C for 2 hours after water quenching medium it provides the best mechanical properties in conjunct on with an improved in microstructure.

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