Microstructure, Compressive Strength and Transport Properties of High Strength Self-Compacting Concretes Containing Natural Pumice and Zeolite
Due to the difficult placement and vibration between reinforcements of reinforced concrete and the defects that it may cause, the use of self-compacting concrete (SCC) is becoming more widespread. Ordinary Portland Cement (OPC) is the most widely used binder in the construction industry. However, the manufacture of this cement results in a significant amount of CO2 being released, which is detrimental to the environment. Thus, an alternative to reduce the cost of SCC is the use of more economical and environmental mineral additives in partial or total substitution of Portland cement. Our study is in this context and aims to develop SCCs both economic and ecological. Two natural pozzolans such as pumice and zeolite are chosen in this research. This research tries to answer questions including the microstructure of the two types of natural pozzolan and their influence on the mechanical properties as well as on the transport property of SCC. Based on the findings of this study, the studied zeolite is a clinoptilolite that presents higher pozzolan activity compared to pumice. However, the use of zeolite decreases the compressive strength of SCC composites. On the contrary, the compressive strength in SCC containing of pumice increases at both early and long term ages with a remarkable increase at long term. A correlation is obtained between the compressive strength with permeable pore and capillary absorption. Also, the results concerning compressive strength and transport property are well justified by evaporable and non-evaporable water content measurement. This paper shows that the substitution of Portland cement by 15% of pumice or 10% of zeolite in HSSCC is suitable in all aspects.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1315971Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 756
 Boel V, Audenaert K, De Schutter G, Heirman G, Vandewalle L, Desmet B, Vantomme J (2007) Transport properties of self-compacting concrete with limestone filler or fly ash. Materials and Structures 40:507–516. doi: 10.1617/s11527-006-9159-z
 Juenger M, Winnefeld F, Provis J, Ideker J (2011) Advances in alternative cementitious binders. Cement and Concrete Research 41: 1232–1243. doi: 10.1016/j.cemconres.2010.11.012
 Pacheco-Torgal F, Abdollahnejad Z, Camões AF, Jamshidi M, Ding Y (2012) Durability of alkali-activated binders: a clear advantage over Portland cement or an unproven issue. Construction and Building Materials 30:400–405. doi: 10.1016/j.conbuildmat.2011.12.017
 Ahmadi B, Shekarchi M (2010) Use of natural zeolite as a supplementary cementitious material. Cement and Concrete Composites 32:134-41. doi: 10.1016/j.cemconcomp.2009.10.006
 Pargar F, Valipour M, Shekarchi M, Tahmasbi F (2010) Study on the effect of exposure conditions on the chloride diffusion of concretes incorporating silica fume, metakaolin and zeolite located in Qeshm Island. Iranian concrete Journal 35.
 Tokushige H, Kamehima H, Kawakami M, BIER T.A (2009) Effect of use of natural zeolite as a mineral admixture and an aggregate on physical properties of cement mortar and porous concrete. In: Proceedings of the 4th international conference on construction materials: performance, innovations and structural implications. Nagoya. pp 1231–1236.
 Feng N, Li G, Zang X (1990) High-strength and flowing concrete with a zeolitic mineral admixture. ASTM Cement Concr Aggr 12:61–69. doi: 10.1520/CCA10273J
 Feng N, Yang H, Zu L (1988) The strength effect of mineral admixture on cement concrete. Cement Concr Res 18:464–472. doi: 10.1016/0008-8846(88)90081-6
 EFNARC. Specifications and guidelines for self-consolidating concrete. Surrey, UK: European Federation of Suppliers of Specialist Construction Chemicals (EFNARC); 2002.
 AFGC. Interim recommendations for use of Self-Compacting Concrete, Association Française de Génie Civil; 2002.