Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 30831
Assessment of Vermiculite Concrete Containing Bio-Polymer Aggregate

Authors: Aliakbar Sayadi, Thomas R. Neitzert, G. Charles Clifton, Min Cheol Han


The present study aims to assess the performance of vermiculite concrete containing poly-lactic acid beads as an eco-friendly aggregate. Vermiculite aggregate was replaced by poly-lactic acid in percentages of 0%, 20%, 40%, 60% and 80%. Mechanical and thermal properties of concrete were investigated. Test results indicated that the inclusion of poly-lactic acid decreased the PH value of concrete and all the poly-lactic acid particles were dissolved due to the formation of sodium lactide and lactide oligomers when subjected to the high alkaline environment of concrete. In addition, an increase in thermal conductivity value of concrete was observed as the ratio of poly-lactic acid increased. Moreover, a set of equations was proposed to estimate the water-cement ratio, cement content and water absorption ratio of concrete.

Keywords: Concrete, Mechanical Properties, eco-friendly, PLA, vermiculite, poly-lactic acid

Digital Object Identifier (DOI):

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1341


[1] Koksal, F., et al. (2013). "Experimental and numerical analysis of new bricks made up of polymer modified-cement using expanded vermiculite." Computers and Concrete 12(3): 19-36.
[2] Sutcu, M. (2015). "Influence of expanded vermiculite on physical properties and thermal conductivity of clay bricks." Ceramics International 41(2, Part B): 2819-2827.
[3] Silva, L. M., et al. (2010). "Role of lightweight fillers on the properties of a mixed-binder mortar." Cement and Concrete Composites 32(1): 19-24.
[4] Koksal, F., et al. (2015). "Combined effect of silica fume and expanded vermiculite on properties of lightweight mortars at ambient and elevated temperatures." Construction and Building Materials 88: 175-187.
[5] Schackow, A., et al. (2014). "Mechanical and thermal properties of lightweight concretes with vermiculite and EPS using air-entraining agent." Construction and Building Materials 57: 190-197.
[6] Abidi, S., et al. (2015). "Impact of perlite, vermiculite and cement on the thermal conductivity of a plaster composite material: Experimental and numerical approaches." Composites Part B: Engineering 68: 392-400.
[7] Tang, W. C., et al. (2008). "Bond performance of polystyrene aggregate concrete (PAC) reinforced with glass-fibre-reinforced polymer (GFRP) bars." Building and Environment 43(1): 98-107.
[8] Sri Ravindrarajah, R. and A. J. Tuck (1994). "Properties of hardened concrete containing treated expanded polystyrene beads." Cement and Concrete Composites 16(4): 273-277.
[9] Tang, W. C., et al. (2014). "Creep and creep recovery properties of polystyrene aggregate concrete." Construction and Building Materials 51: 338-343.
[10] Ferrándiz-Mas, V., et al. (2014). "Lightweight mortars containing expanded polystyrene and paper sludge ash." Construction and Building Materials 61: 285-292.
[11] Chen, B., et al. (2010). "Experimental study of lightweight expanded polystyrene aggregate concrete containing silica fume and polypropylene fibers." Journal of Shanghai Jiaotong University (Science) 15(2): 129-137.
[12] Ling, I. H. and D. C. L. Teo (2011). "Properties of EPS RHA lightweight concrete bricks under different curing conditions." Construction and Building Materials 25(8): 3648-3655.
[13] Sadrmomtazi, A., et al. (2012). "Properties of multi-strength grade EPS concrete containing silica fume and rice husk ash." Construction and Building Materials 35: 211-219.
[14] Chen, B. and J. Liu (2004). "Properties of lightweight expanded polystyrene concrete reinforced with steel fiber." Cement and Concrete Research 34(7): 1259-1263.
[15] Ali A. Sayadi, Thomas R. Neitzert, G. Charles Clifton (2016). "Feasibility of a bio-polymer as lightweight aggregate in perlite concrete" International Journal of Civil, Environmental, Structural, Construction and Architectural Engineering Vol:10, No:6.
[16] ACI Committee (2004). "ACI 211.2, Standard Practice for Selecting Proportions for Structural Lightweight Concrete " American Concrete Institute (ACI): 1-20.
[17] ASTM Standard (2014). "ASTM C567, Standard Test Method for Determining Density of Structural Lightweight Concrete." ASTM International.
[18] ASTM Standard (2012). "ASTM C495, Standard Test Method for Compressive Strength of Lightweight Insulating Concrete." ASTM International.
[19] Ali A. Sayadi, Thomas R. Neitzert, G. Charles Clifton (2016). "Effects of expanded polystyrene (EPS) particles on fire resistance, thermal conductivity and compressive strength of foamed concrete." Construction and Building Materials ,Vol: 112, 716–724.