Properties of Chemically Synthesized Nano-geopolymer Cement based Self-Compacting Geopolymer Concrete(SCGC)
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摘要
The physical and mechanical properties of self-compacting geopolymer concrete(SCGC) using chemically synthesized nano-geopolymer cement was investigated. Nano-geopolymer cement was synthesized using nano-silica, alkali activator, and sodium aluminate in the laboratory. Subsequently, nine nanogeopolymer cement sbased SCGC mixes with varying nano-geopolymer cement content, alkali activator content, coarse aggregate(CA) content, and curing temperature were produced. The workability-related fresh properties were assessed through slump flow diameter and slump flow rate measurements. Mechanical performances were evaluated through compressive strength, splitting tensile strength, and modulus of elasticity measurements. In addition, rapid chloride penetration test, water absorption, and porosity tests were also performed. It was assessed that all mix design parameters influenced the fresh and hardened properties of SCGC mixes. Based on test results, it was deduced that nano-geopolymer cement SCGC performed fairly well. All the SCGC mixes achieved the 28-day compressive strength in the range of 60-80 MPa. Additionally, all mixes attained 60% of their 28-day strength during the first three days of elevated temperature curing. FTIR and SEM analyses were performed to evaluate the degree of polymerization and the microstructure respectively for SCGC mixes.
The physical and mechanical properties of self-compacting geopolymer concrete(SCGC) using chemically synthesized nano-geopolymer cement was investigated. Nano-geopolymer cement was synthesized using nano-silica, alkali activator, and sodium aluminate in the laboratory. Subsequently, nine nanogeopolymer cement sbased SCGC mixes with varying nano-geopolymer cement content, alkali activator content, coarse aggregate(CA) content, and curing temperature were produced. The workability-related fresh properties were assessed through slump flow diameter and slump flow rate measurements. Mechanical performances were evaluated through compressive strength, splitting tensile strength, and modulus of elasticity measurements. In addition, rapid chloride penetration test, water absorption, and porosity tests were also performed. It was assessed that all mix design parameters influenced the fresh and hardened properties of SCGC mixes. Based on test results, it was deduced that nano-geopolymer cement SCGC performed fairly well. All the SCGC mixes achieved the 28-day compressive strength in the range of 60-80 MPa. Additionally, all mixes attained 60% of their 28-day strength during the first three days of elevated temperature curing. FTIR and SEM analyses were performed to evaluate the degree of polymerization and the microstructure respectively for SCGC mixes.
The physical and mechanical properties of self-compacting geopolymer concrete(SCGC) using chemically synthesized nano-geopolymer cement was investigated. Nano-geopolymer cement was synthesized using nano-silica, alkali activator, and sodium aluminate in the laboratory. Subsequently, nine nanogeopolymer cement sbased SCGC mixes with varying nano-geopolymer cement content, alkali activator content, coarse aggregate(CA) content, and curing temperature were produced. The workability-related fresh properties were assessed through slump flow diameter and slump flow rate measurements. Mechanical performances were evaluated through compressive strength, splitting tensile strength, and modulus of elasticity measurements. In addition, rapid chloride penetration test, water absorption, and porosity tests were also performed. It was assessed that all mix design parameters influenced the fresh and hardened properties of SCGC mixes. Based on test results, it was deduced that nano-geopolymer cement SCGC performed fairly well. All the SCGC mixes achieved the 28-day compressive strength in the range of 60-80 MPa. Additionally, all mixes attained 60% of their 28-day strength during the first three days of elevated temperature curing. FTIR and SEM analyses were performed to evaluate the degree of polymerization and the microstructure respectively for SCGC mixes.
引文
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[15]ASTM. Standard Test Method for Static Modulus of Elasticity and Poisson’sRatioofConcreteinCompression[S]. ASTM C469-2002,2002
[16]ASTM. Standard Test Method for Density, Water Absorption, and Voids in Hardened Concrete[S]. ASTM C642-2002, 2002
[17]ASTM. Standard Test Method for Electrical Indication of Concrete Ability to Resist Chloride Ion Penetration[S]. ASTM C1202-2002, 2002
[18]Kirschner A and Harmuth A. Investigation of Geopolymer Binders withRespectto Their ApplicationforBuildingMaterials[J].Ceram.Silik., 2004, 48(11):117-120
[19]Svingala F and Varela B. Alkali Activated Aerogels[C]. In:Proceedings of the Ceramic Engineering and Science Proceedings, 2009
[20]AbdulRahim RH, Azizli KA, Man Z, et al. Effect Sodium Hydroxide Concentration on the Mechanical Property of Non Sodium Silicate Fly Ash Based Geopolymer[J]. J. App. Sci., 2014, 14(23):3 381-3 384
[2]Torgal FP and Jalali S. Eco-efficient Construction and Building Materials[M]. Berlin:Springer Science&Business Media, 2011
[3]Singh B, Ishwarya G, Gupta M, et al. Geopolymer Concrete:A Review of Some Recent Developments[J]. Constr. Build. Mater., 2015, 85:78-90
[4]Xu H and Van-Deventer JSJ. The Polymerisation of Aluminio-silicate Minerals[J]. Int. J. Miner. Process., 2000, 59:247-266
[5]Hos J, McCormick P and Byrne L. Investigation of a Synthetic Aluminosilicate Inorganic Polymer[J]. J. Mater. Sci., 2002, 37(11):2 311-2 316
[6]Brew D and MacKenzie K. Geopolymer Synthesis Using Silica Fume and Sodium Aluminate[J]. J. Mater. Sci., 2007, 42(11):3 990-3 993
[7]O’Connor SJ and MacKenzie KJ. A New Hydroxide-based Synthesis Method for Inorganic Polymers[J]. J. Mater. Sci., 2010, 45(12):3 284-3 288
[8]Hajimohammadi A, Provis JL and Van Deventer JS. One-part Geopolymer Mixes from Geothermal Silica and Sodium Aluminate[J]. Ind.Eng. Chem. Res., 2008, 47(23):9 396-9 408
[9]Sobolev K and Gutiérrez MF. How Nanotechnology Can Change the Concrete World[J]. Amer. Ceram. Soc. Bull., 2005, 84(10):14
[10]Sanchez F and Sobolev K, Nanotechnology in Concrete-a Review[J].Constr. Build. Mater., 2010, 24(11):2 060-2 071
[11]Jo BW, Choi JS, Kang SW. An Experimental Study on Characteristics ofChemicallySyntesizedNano-cementforCarbondioxideResuction[J]. J. Ceram. Process. Res., 2011, 12(3):294-298
[12]EFNARC.GuidelinesforSelf-compactingConcrete[S].EFNARC-2002, 2002
[13]ASTM. Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens[S]. ASTM C39, 2002
[14]ASTM. Standard Test Method for Splitting Tensile Strength of Cylindrical Concrete Specimens[S]. ASTM C496-2002, 2002
[15]ASTM. Standard Test Method for Static Modulus of Elasticity and Poisson’sRatioofConcreteinCompression[S]. ASTM C469-2002,2002
[16]ASTM. Standard Test Method for Density, Water Absorption, and Voids in Hardened Concrete[S]. ASTM C642-2002, 2002
[17]ASTM. Standard Test Method for Electrical Indication of Concrete Ability to Resist Chloride Ion Penetration[S]. ASTM C1202-2002, 2002
[18]Kirschner A and Harmuth A. Investigation of Geopolymer Binders withRespectto Their ApplicationforBuildingMaterials[J].Ceram.Silik., 2004, 48(11):117-120
[19]Svingala F and Varela B. Alkali Activated Aerogels[C]. In:Proceedings of the Ceramic Engineering and Science Proceedings, 2009
[20]AbdulRahim RH, Azizli KA, Man Z, et al. Effect Sodium Hydroxide Concentration on the Mechanical Property of Non Sodium Silicate Fly Ash Based Geopolymer[J]. J. App. Sci., 2014, 14(23):3 381-3 384