High-performance Performance Concrete (HPC) is a booming area in the field of construction firm. The worldwide production of clinker cement has greatly increased to 4400 Mt, which pollutes the atmosphere by emitting CO2 gas. Some supplementary materials took the place of cement to diminish this effect. In this study, Metakaolin (MK) as pozzolanic material is used for the replacement of cement at 0%, 7.5%, 10% and 12.5% in HPC of grade M65. Metakaolin is a dehydroxylated mineral with superior composition of Al2O3-SiO2. Herein, the pozzolanic activity of MK enhances the strength and transport durability properties of concrete by consuming Calcium hydroxide (CH or Ca(OH)2) and forming Calcium alumino silicate hydrate gel (C(A)SH). The scarcity of sand (fine aggregate) is a secondary cause of concern. Therefore, alternative materials like ceramic waste (CW) fine aggregates (having similar properties as M sand) are used in place of crushed gravel sand (M sand) by 0%, 25%, 50%, 75% and 100% from the optimum metakaolin replacement. The optimum mineral mix, MK10% has a compressive strength and RCPT value of 74.96 MPa and 1042 Coulombs respectively. The synergic reaction effect (C(A)SH formation) of 10% MK increases the strength and decreases the RCPT value. The 78.12 MPa and 927 Coulombs are the significant performances of the 50% CW mix. The dynamic strength and durability of HPC are facilitated by the superior interface zone with packing action of fine aggregates, which are equal parts M sand and CW (50:50). These findings concise that CW can partially supplanted as fine aggregate along with MK to make innocuous and sustainable concrete society.

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High Performance Concrete Using Metakaolin and Ceramic Waste Fine Aggregate—A Dissertation

  • Vijayan Ponmalar,
  • Giriambalam Kannan Jegan,
  • Nagarajan Manigandan,
  • Kannusamy Archana

摘要

High-performance Performance Concrete (HPC) is a booming area in the field of construction firm. The worldwide production of clinker cement has greatly increased to 4400 Mt, which pollutes the atmosphere by emitting CO2 gas. Some supplementary materials took the place of cement to diminish this effect. In this study, Metakaolin (MK) as pozzolanic material is used for the replacement of cement at 0%, 7.5%, 10% and 12.5% in HPC of grade M65. Metakaolin is a dehydroxylated mineral with superior composition of Al2O3-SiO2. Herein, the pozzolanic activity of MK enhances the strength and transport durability properties of concrete by consuming Calcium hydroxide (CH or Ca(OH)2) and forming Calcium alumino silicate hydrate gel (C(A)SH). The scarcity of sand (fine aggregate) is a secondary cause of concern. Therefore, alternative materials like ceramic waste (CW) fine aggregates (having similar properties as M sand) are used in place of crushed gravel sand (M sand) by 0%, 25%, 50%, 75% and 100% from the optimum metakaolin replacement. The optimum mineral mix, MK10% has a compressive strength and RCPT value of 74.96 MPa and 1042 Coulombs respectively. The synergic reaction effect (C(A)SH formation) of 10% MK increases the strength and decreases the RCPT value. The 78.12 MPa and 927 Coulombs are the significant performances of the 50% CW mix. The dynamic strength and durability of HPC are facilitated by the superior interface zone with packing action of fine aggregates, which are equal parts M sand and CW (50:50). These findings concise that CW can partially supplanted as fine aggregate along with MK to make innocuous and sustainable concrete society.