Request PDF | On Dec 1, 2008, M. TAHER and others published PHYSICOCHEMICAL PROPERTIES OF METAKAOLIN-LIME PASTES AT DIFFERENT CALCINATION TEMPERATURES OF KAOLINITE CLAY | Find, read and cite all ...
25-3-2019· The materials used in this work were blended OPC limestone (24%), nano metakaolin. This thesis aims to study the effect of some nano materials such as nano metakaolin (NMK) on the hydration characteristics of blended cement pastes up to 90 days of hydration. Blended cements containing 0, 5 and 10 wt% nano MK, were also studied. The hydration and the physico-mechanical characteristics of …
Mahmoud TAHER | Read 21 ... Mahmoud Ahmed Taher. Faculty of Science, ... PHYSICOCHEMICAL PROPERTIES OF METAKAOLIN-LIME PASTES AT DIFFERENT CALCINATION TEMPERATURES OF KAOLINITE CLAY.
Evaluation of Pozzolanic Activity and Physico-mechanical Characteristics in Metakaolin-Lime Pastes Article (PDF Available) in Journal of Thermal Analysis and Calorimetry 84(1):157-163 · April ...
The free lime contents of OPC and OPC–MK pozzolanic cement pastes are graphically represented as a function of hydration age in Fig. 3. The free lime content of OPC paste increases with the increase of curing time up to 90 days; this is due to the continuous hydration of C 3 S and β-C 2 S which liberate free lime.
All pastes presented as viscoelastic fluid and when the MK content increased the strain was higher. In the current work both static and dynamic rheology were used to study the rheological properties of lime and lime-metakaolin pastes in order to understand better the influence of the metakaolin on the workability of lime mortars for restoration.
Request PDF | Physico-chemical and Thermal Characteristics of Lime-silica Fume Pastes | Five lime-silica fume pastes were investigated using initial CaO/SiO2 molar ratios of 0.80, 1.0, 1.30, 1.70 ...
Fig. 13 presents the microstructure of hydrated pastes without metakaolin and with metakaolin analyzed by BSE at 28 days. A relatively simple microstructure is observed in the MPC paste without metakaolin, M00, and many unreacted magnesia particles embeds in the struvite crystals of short columnar and wedge-shaped [24] , [36] , [37] .
Because metakaolin is a very reactive pozzolana (Table 16.15), the calcium hydroxide content of concrete can be virtually eliminated by its incorporation. 396 A range of concrete property improvements have been recorded, including improved resistance to the penetration of chlorides, freeze-thaw resistance and reduced shrinkage; 397 improved sulfate resistance 398 and resistance to acids; 399 ...
Properties of lime and lime pozzolan mortars were studied. The aim of the study was to find influence of ground zeolite and metakaolin addition on the properties of lime mortars and evaluate the effect of curing conditions on final properties of mortars. The main conclusions are as follows: 1.
In recent years, lime mortars mixed with artificial or natural pozzolans are commonly used in restoration applications. The aim of this work is the assessment of carbonation, pozzolanic reaction, setting time, and mechanical properties of metakaolin–lime mortars mixed with crystalline nano-titania (nT) as additive. The studied mortars consist of hydrated lime and metakaolin in 60/40 ratio ...
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Pozzolanic activity of NMK samples, prepared by firing of Al 2 O 3 – rich nano-kaolin (NK) at different temperatures of 750, 775, 800 and 825 °C for 2 h, was studied on 80% NMK – 20% hydrated lime pastes (water/solid = 1) from 2 h up to 7 days. The results of hydration kinetics are graphically represented in Fig. 4, Fig. 5, Fig. 6.The results of Fig. 4, Fig. 5, Fig. 6 indicated that NMK ...
Physicochemical, Microstructural and Thermal Characteristics of ... cements, including the general properties of slag and metakaolin, hydration products reaction mechanisms, ... strength and pore size distribution of hardened lime– pozzolana pastes.
Cementitious properties of metakaolin–normal Portland cement mixture in the presence of petroleum ... The physicochemical characteristics of cocalcined kaolin and petroleum effluent treatment plant (ETP) sludge and its effect on the technological and ... Pastes were prepared by mixing the cement compositions with distilled water ...
Journal article written by Kali Kapetanaki, Chrysi Kapridaki and Pagona-Noni Maravelaki and published in the journal Buildings in issue 31 October 2019, n. 11 v. 9.
Sabria Malika Mansour, Mohamed Tahar Abadia, Karim BellourImprovement of rheological behavior of cement pastes by incorporating metakaolin Eur J Sci Res, 42 (3) (2010), pp. 442-452 ISSN 1450-216X
Article de revue écrit par Kali Kapetanaki, Chrysi Kapridaki et Pagona-Noni Maravelaki et publié dans la revue Buildings dans le numéro 31 octobre 2019, n. 11 v. 9.
Effects of Water Content and Chemical Composition on Structural Properties of Alkaline Activated Metakaolin‐Based Geopolymers. Maricela Lizcano. ... Development the properties of brick geopolymer pastes using concrete waste incorporating dolomite ... Physicochemical and Engineering Aspects, 10.1016/j.colsurfa.2016.09.089, 511, (212-221 ...
Corpus ID: 56161494. The use of a lignosulfonate superplasticizer in repair air lime-metakaolin mortars @inproceedings{PrezNicols2016TheUO, title={The use of a lignosulfonate superplasticizer in repair air lime-metakaolin mortars}, author={M{\'o}nica P{\'e}rez-Nicol{\'a}s and Adrian Duran and Rafael Sirera and {\'I}{\~n}igo Navarro-Blasco and Jos{\'e} Mar{\'i}a Fern{\'a}ndez and Jos{\'e ...
Abstract: This study aims to investigate the effect of MgSO4 solution on the durability of the pastes made of ordinary Portland cement (OPC) blended with 10, 20 and 30 wt.% metakaolin (MK) and the pastes made by partial substitution of metakaolin in the mix containing 30% metakaolin by 5 and 10 wt.% limestone (LS).All pastes were prepared using the suitable amount of water for standard ...
Journal article written by Kali Kapetanaki, Chrysi Kapridaki and Pagona-Noni Maravelaki and published in the journal Buildings in issue 31 October 2019, n. 11 v. 9.
Physico-chemical and mechanical characterization of hydraulic mortars containing nano ... DTA curves for hydrated lime–metakaolin pastes without (ML1 ... of stone-mortar systems and revealed that the nano-titania addition in both hydrated lime–metakaolin and hydraulic lime mortars improves the adhesive properties of the mortar when ...
Metakaolin-based geopolymers: Relation between formulation, physicochemical properties and efflorescence formation. ... Pastes were mixed for 5 min using a mechanical mixer (285 rpm) and then were poured into moulds. After one day at either 25 or 50 °C, ...
Influence of physico-chemical characteristics on the carbonation of cement ... as carbonation can fill in pore space in cement paste. In pastes with elevated metakaolin content, however, the reduction ... J. CabreraThe effect of temperature on the hydration rate and stability of the hydration phases of metakaolin–lime–water systems. ...
Alternative cementations materials such as metakaolin, silica fume, steel fibres, quarry dust, wood ash, lime stone, calcined clays are of interest in concrete.[7,17,40] Kaolinitic clay, widely available in the earth crust are treated with heat of 6000c to 8000c leads to de hydroxylation of the crystalline structure of kaolinite to form metakaolin [1,3,11,16,40].
Read "Evaluation of pozzolanic activity and physico-mechanical characteristics in ceramic powder-lime pastes, Journal of Thermal Analysis and Calorimetry" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
lime stone for mining - kzntar.co.za. Industrial shipping services Limestone-based products Rettig Group –value for generations Indoor climate comfort dolomite and limestone in south africa: supply and demand ... mineral economics . report r49/2005 dolomite and limestone in south ...
In recent years, lime mortars mixed with artificial or natural pozzolans are commonly used in restoration applications. The aim of this work is the assessment of carbonation, pozzolanic reaction, setting time, and mechanical properties of metakaolin–lime mortars mixed with crystalline nano-titania (nT) as additive. The studied mortars consist of hydrated lime and metakaolin in 60/40 ratio ...
Article de revue écrit par Kali Kapetanaki, Chrysi Kapridaki et Pagona-Noni Maravelaki et publié dans la revue Buildings dans le numéro 31 octobre 2019, n. 11 v. 9.
