PubAg

Main content area

You searched for: Subject "calcium silicate" Remove constraint Subject: "calcium silicate"
Start Over

Search

628  Search Results

« Previous | 1 - 20 of 628 |
Number of results to display per page

Search Results

1. Research initiatives on the influence of wollastonite in cement-based construction material- A review

Author:
Nair, Nishant A.; Sairam, V.
Source:
Journal of cleaner production 2021 v.283 pp. 124665
ISSN:
0959-6526
Subject:
calcium silicate,   etc   ; bagasse; brittleness; cement; ceramics; concrete; construction materials; durability; fly ash; furnaces; manufacturing; modulus of rupture; sand; silica; slags; sulfates; wastes; water reuse; water uptake; China; India;     Show all 21 Subjects
Abstract:
... Many materials have been tried and tested as partial replacement of cement in concrete, either waste by-product of any manufacturing process or abundant mineral. Materials commonly used as partial replacement of cement are fly ash, ground granulated blast furnace slag (GGBFS), silica fume, bagasse ash, foundry ash, wollastonite, metakaolin, and so on. A significant issue with concrete is its britt ...
DOI:
10.1016/j.jclepro.2020.124665

2. Approaches to enhance the carbonation resistance of fly ash and slag based alkali-activated mortar- experimental evaluations

Author:
Liu, Shan; Hao, Yifei; Ma, Guowei
Source:
Journal of cleaner production 2021 v.280 pp. 124321
ISSN:
0959-6526
Subject:
calcium silicate,   etc   ; X-ray diffraction; additives; adsorption; carbon dioxide; carbonation; compression strength; construction materials; corrosion; cracking; desorption; durability; fly ash; gypsum; hydrotalcite; nitrogen; scanning electron microscopy; silica; slags; steel;     Show all 20 Subjects
Abstract:
... Alkali-activated composites using by-products such as fly ash and slag have been widely studied to make greener construction materials. However, the carbonation of alkali-activated composites has been reported to induce cracking and corrosion of steel reinforcements in structural elements. This shortcoming has greatly limited the structural applications of alkali-activated composites due to durabi ...
DOI:
10.1016/j.jclepro.2020.124321

3. Comparative study of radium and strontium behaviour in contact with cementitious materials

Author:
Kittnerová, Jana; Drtinová, Barbora; Štamberg, Karel; Vopálka, Dušan; Evans, Nicholas; Deissmann, Guido; Lange, Steve
Source:
Applied geochemistry 2020 v.122 pp. 104713
ISSN:
0883-2927
Subject:
calcium silicate,   etc   ; cement; comparative study; geochemistry; isotopes; models; pastes; radionuclides; radium; sorption; sorption isotherms; strontium; temperature;     Show all 13 Subjects
Abstract:
... A comparative study of the sorption behaviour of radium and strontium was performed on various cementitious materials including crushed hardened cement pastes (HCP) and concretes as well as a synthesised calcium silicate hydrate (CSH) phase.Rd values obtained for the Ra and Sr uptake on commercial cement materials were in the range of 50–380 L kg⁻¹ and 10–30 L kg⁻¹, respectively. No significant di ...
DOI:
10.1016/j.apgeochem.2020.104713

4. Experimental study of fire resistant board configurations under standard fire conditions

Author:
Steau, Edward; Mahendran, Mahen; Poologanathan, Keerthan
Source:
Fire safety journal 2020 v.116 pp. 103153
ISSN:
0379-7112
Subject:
calcium silicate,   etc   ; fire resistance; fire testing; gypsum; gypsum board; heat transfer; insulating materials; magnesium oxide; steel;     Show all 9 Subjects
Abstract:
... Cold-formed Light gauge Steel Frame (LSF) floor-ceiling systems are commonly made with non-combustible fire protective membrane to protect the steel floor joists in fire. Thermal improvements to the fire protective membrane delay the heat transfer to structural elements and provide enhanced fire resistance level. Hence, this study addresses the thermal performance of different fire resistant board ...
DOI:
10.1016/j.firesaf.2020.103153

5. Study on adsorption mechanism of silicate adsorbents with different morphologies and pore structures towards formaldehyde in water

Author:
Wang, Manman; Wen, Bianying; Fan, Baomin; Zhang, Huijuan
Source:
Colloids and surfaces 2020 v.599 pp. 124887
ISSN:
0927-7757
Subject:
calcium silicate,   etc   ; adsorbents; adsorption; diatomaceous earth; formaldehyde; models; pollutants; pollution control; sorption isotherms; surface area;     Show all 10 Subjects
Abstract:
... Silicate with various pore structures and morphologies showed different adsorption effects on removing organic pollutants, but the corresponding adsorption mechanisms are ambiguous. In this work, the adsorption mechanisms of formaldehyde in water by silicate adsorbents with different morphologies and pore structures were investigated. Diatomite with disc-like morphology and calcium silicate with s ...
DOI:
10.1016/j.colsurfa.2020.124887

6. Ionic conductive and photocatalytic properties of cementitious materials: calcium silicate hydrate and calcium aluminoferrite

Author:
Nagao, Masahiro; Kobayashi, Kazuyo; Jin, Yongcheng; Maruyama, Ippei; Hibino, Takashi
Source:
Journal of materials chemistry A 2020 v.8 no.30 pp. 15157-15166
ISSN:
2050-7496
Subject:
calcium silicate,   etc   ; air; cement; electrochemistry; humidity; ions; methylene blue; oxidation; oxygen; partial pressure; photocatalysis; temperature;     Show all 12 Subjects
Abstract:
... Few studies have reported the ionic conductive and photoactive properties of cementitious materials, owing to the compositional and structural variations of cement paste. The present report focuses on calcium silicate hydrate (C-S-H) and tetracalcium aluminoferrite (C₄AF), prepared individually from pure constituent elements. C-S-H is an ionic conductor with a conductivity ranging from 10⁻⁴ to 10⁻ ...
DOI:
10.1039/d0ta04866f

7. A mixture of sewage sludge and red gypsum as an alternative material for temporary landfill cover

Author:
Rosli, Nor Azalina; Aziz, Hamidi Abdul; Selamat, Mohamad Razip; Lim, Leonard Lik Pueh
Source:
Journal of environmental management 2020 v.263 pp. 110420
ISSN:
0301-4797
Subject:
calcium silicate,   etc   ; compression strength; cracking; gels; gypsum; hydraulic conductivity; iron; landfills; plasticity; recycling; sewage sludge; tropics;     Show all 12 Subjects
Abstract:
... This study proposed the recycling of sewage sludge (SS) and red gypsum (RG) as potential temporary landfill cover materials. Mixtures with different SS and RG compositions were prepared and tested in determining the most suitable design mix based on the resulting physical, mechanical, and geotechnical properties, namely the hydraulic conductivity, compressive strength, and plasticity. A maximum co ...
DOI:
10.1016/j.jenvman.2020.110420

8. The design and evaluation of a smart polymer-based fluids transport inhibitor

Author:
Zhou, Yang; Cai, Jingshun; Chen, Ruixing; Hou, Dongshuai; Xu, Jun; Lv, Kai; Zheng, Qi
Source:
Journal of cleaner production 2020 v.257 pp. 120528
ISSN:
0959-6526
Subject:
calcium silicate,   etc   ; adsorption; chlorides; concrete; construction materials; durability; gels; hydrophobicity; moieties; molecular dynamics; nanomaterials; polymers;     Show all 12 Subjects
Abstract:
... The chloride transport through gel pores of cementitious matrixes determines the durability and sustainability of concrete, the most widely applied construction materials. In this work, a smart polymer is designed by molecular dynamics, which can effectively inhibit the transport of fluids throughout the nano-channels of calcium silicate hydrate (C–S–H). This polymer chain owns a high-polarity car ...
DOI:
10.1016/j.jclepro.2020.120528

9. Influence of calcium hydroxide addition on arsenic leaching and solidification/stabilisation behaviour of metallurgical-slag-based green mining fill

Author:
Zhang, Yuying; Gao, Wei; Ni, Wen; Zhang, Siqi; Li, Yunyun; Wang, Ke; Huang, Xiaohui; Fu, Pingfeng; Hu, Wentao
Source:
Journal of hazardous materials 2020 v.390 pp. 122161
ISSN:
0304-3894
Subject:
calcium silicate,   etc   ; arsenic; calcium hydroxide; diffusivity; leaching; mine tailings; mining; neutralization; pH; solidification; toxicity; zeolites;     Show all 12 Subjects
Abstract:
... In this study, metallurgical-slag-based binder (MSB) with different dosages of calcium hydroxide (CH) was mixed with high-arsenic-containing mine tailings (HAMT) to form green mining fill samples (GMFs) for As solidification/stabilisation (S/S). The As leaching characteristics of the GMFs were evaluated using pH-dependent leaching tests, semi-dynamic leaching tests and toxicity leaching tests. The ...
DOI:
10.1016/j.jhazmat.2020.122161

10. Synthesis of calcium silicate as paper filler with desirable particle size from desilication solution of silicon-containing waste residues

Author:
Qiu, Yijin; Cao, Shaotao; Chen, Fangfang; You, Shaowei; Zhang, Yi
Source:
Powder technology 2020 v.368 pp. 137-148
ISSN:
0032-5910
Subject:
calcium silicate,   etc   ; calcium oxide; paper; particle size; reflectance; silicon; sodium hydroxide; tensile strength; wastes;     Show all 9 Subjects
Abstract:
... Resource utilization of silicon is crucial to the sustainable reuse of the silicon-containing waste residues. In this study, a simple method to synthesize calcium silicate as paper filler with desirable particle size from the residues was proposed. Foil-shaped calcium silicate with the average particle size (APS) of about 10 μm and the span of below 1.2 was successfully synthesized. Compared with ...
DOI:
10.1016/j.powtec.2020.04.042

11. Assessing the Adsorption and Diffusion Behavior of Multicomponent Ions in Saturated Calcium Silicate Hydrate Gel Pores Using Molecular Dynamics

Author:
Liu, Zhiyong; Xu, Dong; Gao, Sen; Zhang, Yunsheng; Jiang, Jinyang
Source:
ACS sustainable chemistry & engineering 2020 v.8 no.9 pp. 3718-3727
ISSN:
2168-0485
Subject:
calcium silicate,   etc   ; adsorption; calcium; cations; chlorides; concrete; corrosion; durability; gels; molecular dynamics; silicon; sodium; steel;     Show all 13 Subjects
Abstract:
... In concrete structures, ion transport is a major factor in the corrosion of steel and the loss of concrete durability. Because the macroscopic and microscopic research levels are not sufficient to explain the essential mechanism of ion transport, this Article simulates the transport behavior of nanoscale ions in saturated C–S–H gel pores using molecular dynamics and then explores the influence of ...
DOI:
10.1021/acssuschemeng.9b06817

12. Experimental and Kinetic Study on CaO-based CO₂ Sorbent Pellets with Different Binders

Author:
Zhang, Yang; Gong, Xun; Peng, Yang; Leng, Erwei; Li, Yang; Li, Xiaomin
Source:
Energy & fuels 2020 v.34 no.2 pp. 2028-2034
ISSN:
1520-5029
Subject:
calcium silicate,   etc   ; calcium oxide; carbon dioxide; cellulose; kinetics; pelleting; pellets; sorbents; surface area;     Show all 9 Subjects
Abstract:
... In this work, sorbent pellets were prepared based on six synthetic powdery sorbents. CO₂ uptake tests and kinetic analysis were carried out to screen sorbent pellets. Experimental results showed that the CO₂ capture capacity of sorbent pellets was lower than that of powdery sorbents, which was mainly attributed to reduced Brunauer–Emmett–Teller (BET) specific surface area caused by pore structure ...
DOI:
10.1021/acs.energyfuels.9b03438

13. Enhancement of early-age strength of the high content fly ash blended cement paste by sodium sulfate and C–S–H seeds towards a greener binder

Author:
Zou, Fubing; Hu, Chuanlin; Wang, Fazhou; Ruan, Yunxing; Hu, Shuguang
Source:
Journal of cleaner production 2020 v.244 pp. 118566
ISSN:
0959-6526
Subject:
calcium silicate,   etc   ; cement; concrete; ecosystem services; fly ash; industrial byproducts; sodium sulfate; synergism;     Show all 8 Subjects
Abstract:
... Due to the economic and environmental benefits, the industry by-products like fly ash have been intensively employed to partially substitute cement in concrete and other cementitious materials. However, with the increased substitution level of cement by fly ash, the major drawback is the low early-age strength of cement paste owing to the slow pozzolanic reaction of fly ash. This study aims to acc ...
DOI:
10.1016/j.jclepro.2019.118566

14. Portland Cement Based Immobilization/Destruction of Chemical Weapon Agent Degradation Products

Author:
Walling, Sam A.; Notman, Stuart; Watts, Pat; Govan, Norman; Provis, John L.
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.24 pp. 10383-10393
ISSN:
1520-5045
Subject:
calcium silicate,   etc   ; cement; heat; nerve agents;     Show all 4 Subjects
Abstract:
... The direct immobilization and destruction of two compounds relevant to chemical warfare agents, ethyl methylphosphonic acid (EMPA) and thiodiglycol (TDG), within a freshly mixed Portland cement paste was studied. Cement hydration and phase formation were analyzed to determine the upper limits on the loading of these chemicals achievable in an immobilization setting. EMPA, a degradation product of ...
DOI:
10.1021/acs.iecr.9b01270

15. Correction: Synergy effects of copper and silicon ions on stimulation of vascularization by copper-doped calcium silicate

Author:
Kong, Ni; Lin, Kaili; Li, Haiyan; Chang, Jiang
Source:
Journal of materials chemistry B 2019 v.7 no.20 pp. 3320
ISSN:
2050-7518
Subject:
calcium silicate,   etc   ; chemistry; copper; ions; silicon;     Show all 5 Subjects
Abstract:
... Correction for ‘Synergy effects of copper and silicon ions on stimulation of vascularization by copper-doped calcium silicate’ by Haiyan Li, Jiang Chang et al., J. Mater. Chem. B, 2014, 2, 1100–1110. ...
DOI:
10.1039/c9tb90064k

16. Structure and Intrinsic Mechanical Properties of Nanocrystalline Calcium Silicate Hydrate

Author:
Li, Jiaqi; Zhang, Wenxin; Monteiro, Paulo J. M.
Source:
ACS sustainable chemistry & engineering 2020 v.8 no.33 pp. 12453-12461
ISSN:
2168-0485
Subject:
calcium silicate,   etc   ; X-ray absorption spectroscopy; X-ray diffraction; calcium; cement; computational methodology; concrete; coprecipitation; mechanical properties; nanocrystals; silicon;     Show all 11 Subjects
Abstract:
... Nanocrystalline calcium silicate hydrate (C–S–H) is the binding phase of many low-CO₂ cements. Understanding its structure–mechanical properties relationship is critical in designing sustainable concrete. For the first time, a similar basal spacing (only 0.17 Å variation) of C–S–Hs at Ca/Si ratios of 0.8–1.5 is prepared via coprecipitation. The C–S–H nanostructure is determined using X-ray absorpt ...
DOI:
10.1021/acssuschemeng.0c03230

17. The effect of sodium hydroxide on Al uptake by calcium silicate hydrates (C[sbnd]S[sbnd]H)

Author:
Barzgar, Sonya; Lothenbach, Barbara; Tarik, Mohamed; Di Giacomo, Alessio; Ludwig, Christian
Source:
Journal of colloid and interface science 2020 v.572 pp. 246-256
ISSN:
0021-9797
Subject:
calcium silicate,   etc   ; aluminum; calcium; carbon dioxide; cement; concrete; durability; greenhouse gas emissions; pH; silica; silicon; sodium hydroxide; sorption isotherms; thermogravimetry;     Show all 14 Subjects
Abstract:
... To reduce the CO₂ emissions from cement production, Portland cement (PC) is partially replaced by supplementary cementitious materials (SCM). Reactions of SCM with PC during hydration leads to the formation of CSH with more silicon and aluminum than in PC, which affects the stability and durability of such concrete. Therefore, it is crucial to determine the role of aluminum on CSH properties to pr ...
DOI:
10.1016/j.jcis.2020.03.057

18. Immobilization of hazardous municipal solid waste incineration fly ash by novel alternative binders derived from cementitious waste

Author:
Tang, Pei; Chen, Wei; Xuan, Dongxing; Cheng, Hiuwun; Poon, Chi Sun; Tsang, Daniel C.W.
Source:
Journal of hazardous materials 2020 v.393 pp. 122386
ISSN:
0304-3894
Subject:
calcium silicate,   etc   ; carbon dioxide; chlorides; fly ash; greenhouse gas emissions; lead; municipal solid waste; pastes; rehydration; temperature; waste incineration;     Show all 11 Subjects
Abstract:
... This work aims to immobilize hazardous municipal solid waste incineration fly ash (IFA) using alternative binders recycled from cementitious waste (CW) that was dehydrated. The dehydration temperature of CW applied was 200 °C, 500 °C and 800 °C, and the resulted binder was labelled as DCW2, DCW5 and DCW8, respectively.Thermal treatment increased the rehydration capacity of DCWs. Higher temperature ...
DOI:
10.1016/j.jhazmat.2020.122386

19. Synthesis and characterization of fly ash geopolymer paste for goaf backfill: Reuse of soda residue

Author:
Zhao, Xianhui; Liu, Chunyuan; Zuo, Liming; Wang, Li; Zhu, Qin; Liu, Youcai; Zhou, Boyu
Source:
Journal of cleaner production 2020 v.260 pp. 121045
ISSN:
0959-6526
Subject:
calcium silicate,   etc   ; aluminum; compression strength; elemental composition; fly ash; gels; microstructure; polymers; recycling; silicon; solid wastes; China;     Show all 12 Subjects
Abstract:
... Soda residue (SR), an industrial Ca-containing solid waste, threatens and pollutes the coastal ecological environment in China. To promote the resource recycling of soda residue, this paper proposes the synthesis method and performance evaluation of fly ash-based geopolymer paste using soda residue for goaf backfill. The pre-treatment of SR and the solid-liquid mixing technique were determined, an ...
DOI:
10.1016/j.jclepro.2020.121045

20. The cementitious composites using calcium silicate slag as partial cement

Author:
Yan, Changwang; Zhao, Hongwei; Zhang, Ju; Liu, Shuguang; Yang, Zhijie
Source:
Journal of cleaner production 2020 v.256 pp. 120514
ISSN:
0959-6526
Subject:
calcium silicate,   etc   ; aluminum oxide; cement; compression strength; fly ash; industrial wastes; models; pollution; pollution control; prediction; response surface methodology; slags;     Show all 12 Subjects
Abstract:
... Calcium silicate slag (CSS) is an industrial waste residue produced by the extraction of Al₂O₃ from high-alumina fly ash. CSS, along with cement, is used as a cementing material to reduce land pollution and to utilize industrial waste effectively. The effects of the replacement rate and age of CSS on the compressive strength and hydration degree of the cementitious composite system are examined, a ...
DOI:
10.1016/j.jclepro.2020.120514