FIELD OF THE INVENTION

The present invention relates to a field of protective wall structures, more particularly relates to a blast resistant concrete wall structures.

BACKGROUND- OF THE INVENTION

A blast wail assembly and the components described herein form an integrated system that effectively absorbs blast energy. Unlike conveivlionai systems, the components of the blast wall assembly function in a manner similar to highway "crumple zones" by absorbing the energy generated by the sudden impact of a blast wave on the exterior surface of the blast wall, Although the blast wall assembly may incur repairable damage, the blast wall assembly absorbs a substantial portion of the blast energy rather than imploding into the interior space of the structure. Thus, the blast wall assembly greatly enhances the safety of the building structure and the occupants of the building structure, US8079188 entitled "Energy absorbing blast wall for building" discloses a wall system to protect a building structure for pressure caused by explosive blasts. IJS-5862640 entitled ''Protective wails and method of construction ^' discloses a hollow block fonned of a mixture of mineralized wood shaving and concrete and having a density of no more than approximately I ion per cubic meter,

As mentioned above, there are lot. of other available prior arts which discloses energy and pressure absorbing concrete wall However, they are not cost effective and eco-friendly. Accordingly, there is a need for developing blast resistant reinforced lightweight concrete that are eeo-friendiy and inexpensive. SUMMARY OF THE INVENTION

The present invention discloses the method of producing biast resistant reinforced lightweight concrete using oil palm shell as coarse aggregate. The method of producing blast resistant reinforced lightweight concrete using oil palm shell comprising the steps of: (a) replacing the conventional crushed granite coarse aggregate by OPS; and (b) using OPS in the reinforced concrete and 10% of silica fume eementitious material.

DETAILED DESCRIPTION OF THE INVENTION

In the following description, numerous specific details are set forth. However, it is to be understood that the embodiments of the invention may be practiced without these specific details. In other instances, well-known hardware, software, materials, structures and techniques have not been shown in detail in order not to obscure the understanding of this description. In this description, references to "one embodiment' ^" ' or "an embodiment" mean that the feature being referred to is included in at least, one embodiment of the invention. Moreover, separate references to "one embodiment" in this description do not necessarily refer to the same embodiment; however, neither are such embodiments mutually exclusive, unless so stated and except as will be readily apparent to those of ordinary skill in the art. Thus, the invention may include any variety of combinations and/or integrations of the embodiments described herein. The embodiments are described in sufficient detail to enable those skilled in the art to practice the embodiments and it is to be understood that the logical, software, hardware and other- changes may be made without departing from the scope of the embodiments. The following detailed description is therefore not to be taken in a limiting sense.

The present invention relates to a method of developing blast resistant concrete using local palm oil waste, commonly known as oil palm shell (OPS). Oil palm shell concrete (OPSC") is a lightweight concrete and when reinforced it could be used as blast resistant concrete. Oil palm shell is lightweight and has high impact and abrasion resistance. Hence oil palm shell is used to replace conventional granite aggregate to produce OPSC with the advantages of green, lightweight concrete and high impact resistance. The OPSC is lightweight due to its hardened density of less than 20O0kg½\ stipulated for lightweight concrete. T he compressive strength of OPSC was found in the range of 35-40 MPa, The reinforcement ratio of 1 % was used while developing reinforced OPSC ^' , The signi ficance of the OPSC when subjected to blast load is the energy absorbing capabil ity of OPS. It has shown excellent energy absorbing capacity compared to conventional crushed granite aggregate tor similar blast load. The concrete could be used for protecting structures against impact/blast and gas explosion. In addition, the use of high energy absorbing capacity lightweight coarse aggregate is an innovative method to produce blast resistant concrete slab, as the conventional blast resistant concrete slabs are made with high performance concrete with high cement content and large amount of steel fibers. The use of waste material to produce blast resistant OPSC concrete slab gains the environmental advantage and cost efficiency.

The present invention discloses the method of producing blast resistant reinforced lightweight concrete using oil palm shell as coarse aggregate. The method of producing blast resistant reinforced lightweight concrete using oil palm shell comprising the steps of: (a) replacing the conventional crushed granite coarse aggregate by OPS; and (b) using OPSC in the reinforced concrete and 10% of silica fume as cementiiious material.

The present invention is related to a method of producing blast resistant reinforced lightweight concrete using oil palm shell as coarse aggregate. Being the second largest palm oil production country, Malaysia generated about 4 million tons of oil palm shell as waste every year. The features of the oil palm shell used in the construction of the blast resistant reinforced lightweight concrete include:

* use of local palm oil waste as coarse aggregate to form the lightweight oil palm shell concrete (OPSC) that can be reinforced to be used as blast resistant concrete:

* lightweight and high impact and abrasion resistance of the oil palm shell; good energy absorption capability of the oil palm shell than convenisona! crushed granite;

high energy absorbing lightweight oil palm shell coarse aggregate for the blast resistant concrete slab; and

environmental friendly and cost effective.