International Journal of Engineering and Technical Research (IJETR) ISSN: 2321-0869 (O) 2454-4698 (P) Volume-8, Issue-4, April 2018 65 www.erpublication.org Abstract— This paper describes the influence of the filler material on compressive properties of acrylonitrile butadiene styrenecomposites. Itpossesses more compression strength than other plastic materials like Nylon6 and hence an effort has been made to further increase the compressive strength by the inclusion of Wollastonite. Acrylonitrile butadiene styrene is reinforced with Wollastonite and test specimens are prepared as per ASTM D695 standards. Tests were conducted on different percentage 3, 5, and 7 wt. % of Wollastonite in acrylonitrile butadiene styreneand pure acrylonitrile butadiene styrene. The compressive strength leads to improve up to 5 wt. % of Wollastoniteacrylonitrile butadiene styrene composites and further addition of Wollastonite (7 wt. %) that reduction in the compression strength of the acrylonitrile butadiene styrene composite. Index Terms— Wollastonite (Calcium Silicate), Acrylonitrile Butadiene Styrene (ABS), Compressive strength. I. INTRODUCTION Wollastonite(CaSiO 3 )is calcium inosilicate mineral contain ing small amounts of magnesium, iron, and manganese substituting for calcium, white in colour. It forms when impure limestone is subjected to high pressure and temperature sometimes in presence of silica-bearing fluids as in skarns or contact metamorphic rocks. Wollastonite has importance in industrial applications worldwide. It is used in many industries, most often by tile factories which have integrated it into the manufacturing of ceramic, metallurgy, paint filler, friction products etc. [1]so as to improve many performance parameters, and this is because of its fluxing properties, whiteness, freedom from volatile constituents, and sharp and pointy particle shape. When used in ceramics, Wollastonite decreases its shrinkage and evolution of gas during firing, increases green, fired strength, permits fast firing, maintains brightness during firing, reducescracking, crazing, and glaze defects. In metallurgical applications, wollastonite serves as a welding flux, a slag conditioner, a source for calcium oxide, and to protect the molten metal surface during continuous steel casting. It is used as an additive in paint, due to increasesin durability and improves resistance to weather andit acts as a pH buffer, reduces pigment consumption, gloss and acts as a suspending and Prapul Chandra A C, Assistant Professor, R V College of Engineering, Bengaluru, Karnataka Dr. H V Byregowda, Professor, Ghousia College of Engineering, Ramanagara, Karnataka Gangadhar T G, Assistant Professor, SJBIT, Bengaluru, Karnataka Mohammed Ayoob Khan, PG Student, R V College of Engineering, Bengaluru, Karnataka flatting agent. In plastics, wollastonite improves compressive, flexural and tensile strength, reduces resin consumption, improves dimensional and thermal stability at elevated temperatures. By using these additives it is possible to alter the properties of polymers to required level and conditions. [2,3] Acrylonitrile Butadiene Styrene (ABS) is a polymer and opaque thermoplastic. Thermoplastics become liquid (have a “glass transition”) at a certain temperature (105 degrees Celsius in the case of ABS polymer). ABS liquefy, which allows them to attain semi liquid state that can be easily injection moulded and subsequently recycled. In contrast, thermosets can only be heated only once (during the injection moulding). ABS polymer is also an amorphous material that is it does not exhibit the characteristics of crystalline solids. ABS material is commonly polymerized through process of emulsion. A well-known example of an emulsified product is milk. ABS is also created, although less commonlyby a patented process that is continuous mass polymerization. Around the world, the commonly used methodology to create ABS is the emulsion process. The important character of ABS to note is that because ABS is a thermoplastic, it can be easily recycled as the other thermoplastic materials. This indicates that a most common way of producing ABS plastic is from other ABS plastic (i.e. making ABS from ABS) [4] II. EXPERIMENTAL: The specimen preparation for raw ABS and ABS/Wollastonite specimen has been done as shown in the Fig. …... Figure 1: process chart Investigation of Compressive Properties of Wollastonite (CaSiO3) reinforced Acrylonitrile Butadiene Styrene composites Prapul Chandra A C, Dr. H V Byregowda, Gangadhar T G, Mohammed Ayoob Khan