EFFECT OF SPEED ROTATION ON THE COMPRESSIVE STRENGTH OF HORIZONTAL MIXER FOR CELLULAR LIGHTWEIGHT CONCRETE

Aphai  Chapirom; Teerawat  Sinsiri; Chai  Jaturapitakkul; Prinya  Chindaprasirt

Authors

Aphai Chapirom School of Civil Engineering, Faculty of Engineering, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand.
Teerawat Sinsiri School of Civil Engineering, Faculty of Engineering, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand.
Chai Jaturapitakkul Department of Civil Engineering, Faculty of Engineering, King Mongkut’s University of Technology Thonburi, Bangkok, 10140, Thailand.
Prinya Chindaprasirt Sustainable Infrastructure Research and Development Center, Department of Civil Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen, 40000, Thailand.

Keywords:

Effect of speed cellular concrete, cellular lightweight concrete, speed mixer of cellular concrete

Abstract

This research study is on the rotation speed of a cellular concrete mixer. The study looks at how the mixer affects the properties - the compressive strength, water absorption, and drying density - of cellular concrete. A cellular concrete wet density of 1,000 kg/m3 then foam agent density of 49 kg/m3 and water to cement ratio is 0.5 and sand to cement ratio is 0.95 of cellular concrete will test age 28 days to dry with foaming agent (SUT V2.1) in the mixer. The impeller has 5 rotation speeds, which are 15, 30, 45, 60, and 75 rpm. The study compares the properties of the cellular concrete produced at each speed. The test found that the rate of rotation affects the properties of the cellular concrete. Setting the rotation speed of the concrete mixer at 45 rpm provides a higher compressive strength and water absorption in which the foam size and spread is more even in the concrete than at all the other speeds.

References

American Concrete Institute. (2014). 523.3R-14. Guide for Cellular Concretes above 50 lb/ft3. American Concrete Institute, Farmington Hills, MI, USA.

ASTM. (2003). C33-03. Standard Specification for Concrete Aggregates. ASTM International, West Conshohocken, PA, USA.

ASTM. (2007). C150-07. Standard Specification for Portland Cement. ASTM International, West Conshohocken, PA, USA.

ASTM. (1993). C796-97. Standard Test Method for Foaming Agents for Use in Producing Cellular Concrete Using Preformed Foam. ASTM International, West Conshohocken, PA, USA.

ASTM. (1999). C869-91. Standard Specification for Foaming Agents Used in Making Preformed Foam for Cellular Concrete. ASTM International, West Conshohocken, PA, USA.

Chindaprasirt, P., Jaturapitakkul, C., and Sinsiri, T. (2005). Effect of fly ash fineness on compressive strength and pore size of blended cement paste. Cement Concrete Comp., 27(4):425-428.

Ferraris, C.F. (2001). Concrete mixing methods and concrete mixers: state of the art. J. Res. Natl. Inst. Stan., 106:391-399.

Fouad, H.F. (2006). Cellular concrete. In: Significance of Tests and Properties of Concrete and Concrete-Making Materials STP 169D. Lamond, J.F. and Pielert, J.H., (eds). ASTM International, West Conshohocken, PA, USA, p. 561-599.

Han, D. and Ferron, R.D. (2015). Effect of mixing method on microstructure and rheology of cement paste. Constr. Build. Mater., 93:278-288.

Kearsley, E.P. and Wainwright, P.J. (2002). The effect of porosity on the strength of foamed concrete. Cement Concrete Res., 32(2):233-239.

Nambiar, E.K.K. and Ramamurthy, K. (2007). Air-void characterisation of foam concrete. Cement Concrete Res., 37(2):221-230.

Nandi, S., Chatterjee, A., Samanta, P., and Hansda, T. (2016). Cellular concrete & its facets of application in civil engineering. Int. J. Civ. Eng., 5(Special 1):37-43

Sinsiri, T. and Chapirom. A., inventors; Suranaree University of Technology, assignee. June 29, 2016. Horizontal Concrete Mixer. Thailand patent no. 1603001086.

Thai Industrial Standards Institute. (2013). Thai Industrial Standard, 2601-2556. Cellular Lightweight Concrete of Bricks. Ministry of Industry, Bangkok, Thailand.

Yu, X. and Luo, S. (2010). Pore structure and microstructure of foam concrete. Adv. Mat. Res., 177:530-532.