Simultaneous DSC and TG analysis of high-performance concrete containing natural zeolite as a supplementary cementitious material

Trník, Anton; Scheinherrová, Lenka; Medveď, Igor; Černý, Robert

doi:10.1007/s10973-015-4546-8

Cited by 45 publications

(15 citation statements)

References 28 publications

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“…This peak shift to the lower temperature side with addition of NZ can be related to presence of disordered calcium hydroxide. In addition, the area of this peak decreased with the increases of amount of NZ as a result of pozzolanic reaction with zeolite [60]. The endothermic effect appears in 680-780 ºC is which can be devoted to the decomposition of calcium carbonate.…”

Section: Characterization Of Nz-cement Pastesmentioning

confidence: 92%

Characterization and Evaluation of Natural Zeolite as a Pozzolanic Material

Saraya

Thabet

2018

Al-Azhar Bulletin of Science

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This paper presents details about mineralogical and chemical composition of natural zeolite (NZ) from Harrat Shama for using it as a pozzolanic material. The structural properties and mineralogical composition of NZ were determined using XRF, XRD, FTIR, DSC, SEM-EDX as well as study surface texture and cation exchange capacity. The geopolymer paste was prepared using sodium silicate solution as activator for zeolite and incubated at 25 and 45 ºC up to 90 days. The compressive strength of NZ-based geopolymer was investigated up to 90 days. Five blended cement were designed by substitution for Portland cement by 0 %, 5 %, 10 %, 15 % and 20% of NZ. The compressive strength of NZ-OPC pastes were studied up to 90 days. The microstructure of NZ-Based geopolymer and hydrated NZ-cement pastes were tested. The results were shown that the sum of SiO 2 , Al 2 O 3 , and Fe 2 O 3 content in the natural zeolite was approximately 82.71.3% and mainly composed of clinoptilolite mineral. Geopolymerization of NZ gave a good dense geopolymer matrix with high early stage mechanical properties. The NZ has shown improving early stage compressive strength of all blended cement pastes up to 7 days. The incorporation of nature raw zeolite in cement, up to 10% wt, improved the compressive strength to 7-29%. Generally, Saudi Arabian natural zeoilite (NZ) have high pozzolanic properties and could be used in the preparation of geopolymers matrix and blended cement pastes.

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Section: Characterization Of Nz-cement Pastesmentioning

confidence: 92%

Characterization and Evaluation of Natural Zeolite as a Pozzolanic Material

Saraya

Thabet

2018

Al-Azhar Bulletin of Science

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“…The important advantages of using on concrete properties, are high f c , high tensile, modulus of elasticity, enhanced durability, low permeability to chloride and water intrusion, increasing abrasion resistance, resistance to chemical attacks from chlorides, acids, nitrates and sulfates. [6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Natural Zeolite-Pozzolan on Compressive Strength of Oil-Polluted Concrete Marine Structures

2017

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Oil pollution into the concrete composed materials, leads to decrease the compressive strength of the constructed structure. In the present study, effect of using a natural pozzolan named Zeolite on concrete structures was tested in different marine conditions. A fixed amount of oil equal to 2% of sand weight was added as the pollution into the concrete composed materials. Natural Zeolite was added into the concrete instead of cement to the mix design with weight percentages of 10, 15 and 20. After preparing and curing, concrete specimens were placed into the three different conditions: fresh water, tidal, and sea water environments. Results of compressive strength tests showed that replacement of natural Zeolite instead of cement significantly increased compressive strength in comparison with control specimens, in all environments. Adding 20% natural Zeolite increased the compressive strength to its highest values about 60-85% higher than control specimens.

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“…Zeolites contribute to the formation of cement-like hydrated products during the hydration of cement and to Ca(OH)2 consumption occurred during the hydration process. So, zeolites improve performances of mortar/concrete [8]. Analcime is known as second valuable zeolite mineral after from clinoptilolite in natural zeolite groups.…”

Section: Introductionmentioning

confidence: 99%

Determination of Pozzolanic Activity for Using Natural Zeolite Analcime in Sustainability Additive Cement Products

Akgün

2017

PEN

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It is known that the cement industry is responsible for 5-8% of world CO2 emissions and also for intensive energy consumption. For this reason, cement productions need to sustainability studies. Mineral admixtures added to cement as partial replacement material enable to sustainable blended cement productions due to used less amount of cement. Mineral admixtures with pozzolanic property are also preferred in terms of increasing cement performances. This situation corresponds to improved performance of cement and concrete products as well as saving energy, reducing world CO2 emissions. In recent years, the cement industry has been using natural zeolites extensively as pozzolanic materials. Analcime is known as second valuable zeolite mineral after from clinoptilolite in natural zeolite groups The aim of this study is to determinate the pozzolanic properties of analcime and to investigate whether it has potential availability in sustainable blended cement production. The clinoptilolite was used with comparison purpose in this study. Blaine values, densities, chemical composions, pozzolanic activities, mineralogical structures of analcime and clinoptilolite which are subject of study were determined. Accordance with TS 25, which contains pozzolan conformity criterias, 7-days average compressive strength values of limepozzolan mixture samples were determined. The datas obtained shown that, the 7-days average compressive strengths of lime-zeolite (pozzolan) blended samples are 9.02 MPa for clinoptilolite and 6.3 MPa for analcime. The total content of Si02 + Al2O3 + Fe2O3 was 77.3% for clinoptilolite and 73.16% for analcime. Accordingly, analcime which is a natural zeolite satisfies to puzolan conformity criterias in TS 25 has the potential to be an alternative to clinoptilolite which is more widely used in cement productions.

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Simultaneous DSC and TG analysis of high-performance concrete containing natural zeolite as a supplementary cementitious material

Cited by 45 publications

References 28 publications

Characterization and Evaluation of Natural Zeolite as a Pozzolanic Material

Characterization and Evaluation of Natural Zeolite as a Pozzolanic Material

Effect of Natural Zeolite-Pozzolan on Compressive Strength of Oil-Polluted Concrete Marine Structures

Determination of Pozzolanic Activity for Using Natural Zeolite Analcime in Sustainability Additive Cement Products

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