scholarly journals The Effect of Different Boundary Support Condition and Reinforcement Orientation on Impact Resistance of Light Weight Oil Palm Shells Reinforced Geogrid Concrete Slab

2015 ◽  
Author(s):  
A H ◽  
F USMAN ◽  
GHAZAL MALIK ◽  
K N ◽  
M A ◽  
...  
Keyword(s):  
Oil Palm ◽  
Concrete Slab ◽  
Impact Resistance ◽  
Light Weight ◽  
Support Condition ◽  
Reinforcement Orientation

Development of Lightweight Concrete using Industrial Waste Palm Oil Clinker

2021 ◽  
Author(s):  
Ibrahim Al-Ani ◽  
◽  
Wan Hamidon ◽  
Wan Mohtar ◽  
Basma Alwachy ◽  
...  
Keyword(s):  
Palm Oil ◽  
Oil Palm ◽  
Lightweight Concrete ◽  
Light Weight ◽  
Durability Properties ◽  
Light Weight Concrete ◽  
Water Absorption Test ◽  
Natural Aggregates ◽  
Definition Of ◽  
Strength And Durability

Concrete is a major material used in the construction of buildings and structures in the world. Gravel and sand are the major ingredients of concrete but are non-renewable natural materials. Therefore, the utilisation of palm oil clinker (POC), a solid waste generated from palm oil industry is proposed to replace natural aggregate in this research to reduce the demand for natural aggregates. One mix of ordinary concrete as control concrete; while four mix proportions of oil palm clinker concrete were obtained by replacing 25 %, 50 %, 75 %, and 100 % of gravel and sand of control concrete with coarse and fine oil palm clinker respectively by volume, with same cement content and water cement ratio. Compressive strength test was carried out of concretes with different percentages of oil palm clinker; whereas water absorption test according to respective standard, were carried out to determine the durability properties of various mixes. Based on the results obtained, the study on the effect of percentage of clinker on strength and durability properties was drawn. According to ACI classification of light weight concrete only the 100 percentage replacement can achieve the definition of light weight concrete since its density less than 1900 kg/m3 and strength larger than 17 MPa. Eventually the 25 % replacement of the normal aggregate by the OPC will improve the strength and durability of the concrete.

Numerical Analysis of Anti-Impact Performances of the Reinforced Concrete Slab

2012 ◽  
Vol 249-250 ◽  
pp. 1063-1068
Author(s):  
Qian Ma ◽  
Dan Wu ◽  
Xu Dong Shi ◽  
Xiu Gen Jiang
Keyword(s):  
Reinforced Concrete ◽  
Concrete Slab ◽  
Concrete Strength ◽  
Impact Resistance ◽  
Reinforced Concrete Slab ◽  
Reinforced Concrete Slabs ◽  
Steel Bar ◽  
Parameterized Modeling ◽  
Element Theory ◽  
Bar Diameter

The influence of the structure parameters on the anti-impact performances of the reinforced concrete slab is studied in the article. The reinforced concrete model is established by using ANSYS 13.0/LS-DYNA and nonlinear finite element theory and the parameterized modeling is achieved. The results show that the increase of the thickness of the slab and the steel bar diameter result in the enhancement of impact resistant capability of the slab; a appropriate quantity of reinforcement is significant; Increasing the concrete strength has a distinct impact on the slab’s impact resistance when using relatively low strength concrete. However the influence becomes weak after the concrete strength comes to C60 and higher. The fruits are useful to the designing of reinforced concrete slabs.

Fire Test on Two-way Simply Supported Concrete Slab

2013 ◽  
Vol 405-408 ◽  
pp. 2380-2383
Author(s):  
Zhi Nian Yang ◽  
Yu Li Dong
Keyword(s):  
Fire Test ◽  
Concrete Slab ◽  
Temperature Gradients ◽  
Experimental Results ◽  
Support Condition ◽  
Simply Supported ◽  
Temperature Distributions ◽  
Short Span ◽  
Displacement Transducers ◽  
Horizontal Displacements

This paper describes the results of a fire test conducted on two-way simply supported concrete slab. The details of support condition, arrangement of reinforcement, position of displacement transducers and thermocouple trees are described. The experimental results such as the temperature distributions within the slab, vertical deflections and horizontal displacements are presented. The experimental results show that the temperature distribution along the slab depth was nonlinear and the temperature gradients in the slab were large. Three main cracks parallel to the short span direction occurred on the top surface of the slab. It is shown that two-way simply supported concrete slab has good fire resistance.

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.

scholarly journals The Design of Experimental Production of Briquette Solid Fuel from Oil Palm Fiber and Kernel Meal Residual

2020 ◽  
Vol 24 (6) ◽  
pp. 31-42
Author(s):  
Siva Sitthipong ◽  
Prawit Towatana ◽  
Sittipong Lohwirakorn ◽  
Chaiyoot Meengam ◽  
Suppachai Chainarong
Keyword(s):  
Experimental Design ◽  
Combustion Rate ◽  
Solid Fuel ◽  
Oil Palm ◽  
Impact Resistance ◽  
Mixture Ratio ◽  
Palm Fiber ◽  
Kernel Meal ◽  
Compression Resistance ◽  
Resistance Value

The objective of this research was to study the experimental design for the production of briquette solid fuel from oil palm fiber and kernel meal residue by Factorial Design. Independent variables consisted of mixture ratio of oil palm fiber to oil palm kernel meal residue, percent of coordinate volume and the briquette forming pressure whereas the dependent variables were composed of compression resistance value, impact resistance value and combustion rate. The results of the experimental design showed that at 20 tons of forming pressure, the mixture ratio of kernel meal residue to oil palm fiber 80:20 and 20 percent of coordinate volume provided the best compression resistance value of 2,636 Newton with 85.75% impact resistance value, combustion rate of 1.71 Grams/Minute, heating value of 4386.3 Calories/Gram and the density of 700 Kilograms/Cubic Meter.

scholarly journals Study on Behaviour of Cellular Concrete Slab

2018 ◽  
Vol 7 (2.12) ◽  
pp. 420
Author(s):  
Sindhu Nachiar S ◽  
Anandh S ◽  
Jeyem Veerarajan
Keyword(s):  
Concrete Slab ◽  
Single Point ◽  
Void Volume ◽  
Light Weight ◽  
Test Results ◽  
Structural Elements ◽  
Conventional Concrete ◽  
Air Voids ◽  
Construction Techniques ◽  
Light Weight Concrete

Generally for any construction, normal conventional concrete is used to obtain required strength as per design. In the construction industry, now a day’s many construction techniques are in practice to minimise the self weight of concrete, thereby reducing the size of structural elements. One of the most widely adopting techniques is use of light weight concrete. But use of these light weight concrete do not fulfil the strength requirement as per the design of the structure. Hence it is used only as non-load bearing structural elements in the field. In view of this, in this study the attempt has been made to introduce the air voids in conventional concrete without compromising the strength. In this work the air voids are introduced in the concrete slabs and it is tested in the laboratory to know the performance. For this purpose, the slab of the size of 600mm x 600mm x 100mm is prepared with the voids of diameters 30mm, 35mm and 40mm. The voids are introduced in the concrete slab in four different configurations (line, X, I and matrix) to prepare the cellular elements. The normal and cellular slabs are tested under single point loading and the effect of various configurations is studied at the age of 28 days. From the test results, it was found that the slab with void volume of 1.59% shows the lowest stiffness and the slab with void volume of 2.28% shows the highest stiffness.

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