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You searched for subject:(Cement replacement material). Showing records 1 – 3 of 3 total matches.

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University of Saskatchewan

1. Sapal, Shailza Singh 1985-. Effectiveness of a Natural Pozzolanic Material from Southern Saskatchewan for Cement Replacement in Concrete.

Degree: 2018, University of Saskatchewan

Pozzolans are a category of supplementary cementitious materials that can be used as a partial replacement of portland cement in concrete. Aside from their environmental benefits, some pozzolans have been found to increase the strength, reduce the permeability, and thereby increase the durability of concrete. In this study, a natural pozzolanic material from deposits in Southern Saskatchewan was evaluated for its effectiveness as a partial replacement of portland cement in the production of concrete. Specimens with replacement amounts of 10%, 20%, and 30% by weight of cement were prepared and tested to measure compressive strength and permeability, along with a reference mix without pozzolan for comparison. The effect of sieving out particle sizes greater than 74 μm was investigated. The results showed that the 10% and 20% replacement amounts slowed down the strength development, but produced long-term compressive strengths at greater than six months that did not differ significantly from that of the reference mix, except when pozzolan particle sizes were not limited to less than 74 μm at the 20% replacement amount. The 30% replacement amount produced concrete that was weaker than the control mix by 16% and 8% at 56 days and one year, respectively, when the particle size was controlled. The permeability of samples prepared with 10% pozzolan was statistically lower than that of the reference mix and was also statistically lower when pozzolan particle sizes were limited to less than 74 μm. The natural pozzolan is therefore considered to be an effective cement replacement material. Advisors/Committee Members: Wegner, Leon D, Boulfiza, Mohamed, Feldman, Lisa R, Tabil, Lope G.

Subjects/Keywords: Cement replacement material; strength; durability.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Sapal, S. S. 1. (2018). Effectiveness of a Natural Pozzolanic Material from Southern Saskatchewan for Cement Replacement in Concrete. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/11256

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Sapal, Shailza Singh 1985-. “Effectiveness of a Natural Pozzolanic Material from Southern Saskatchewan for Cement Replacement in Concrete.” 2018. Thesis, University of Saskatchewan. Accessed October 17, 2019. http://hdl.handle.net/10388/11256.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Sapal, Shailza Singh 1985-. “Effectiveness of a Natural Pozzolanic Material from Southern Saskatchewan for Cement Replacement in Concrete.” 2018. Web. 17 Oct 2019.

Vancouver:

Sapal SS1. Effectiveness of a Natural Pozzolanic Material from Southern Saskatchewan for Cement Replacement in Concrete. [Internet] [Thesis]. University of Saskatchewan; 2018. [cited 2019 Oct 17]. Available from: http://hdl.handle.net/10388/11256.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sapal SS1. Effectiveness of a Natural Pozzolanic Material from Southern Saskatchewan for Cement Replacement in Concrete. [Thesis]. University of Saskatchewan; 2018. Available from: http://hdl.handle.net/10388/11256

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


University of Portsmouth

2. Malaki Zanjani, Elyas. Enhancing the performance of cementious composite through hooked end steel fibres and cement replacement materials.

Degree: PhD, 2019, University of Portsmouth

The aim of this study is to investigate the mechanical behaviour of concrete reinforced by hooked end steel fibres with the effects of cement replacement materials and fibre properties on the fibre-matrix bond. The mechanical performance and specifically the pullout behaviour of steel fibres with different hook shapes and tensile strengths in various cementitious material are studied. This research also aims to investigate the behaviour of steel fibre reinforced concrete in precast jacking pipes. The cement replacements which have been used in this research included silica fume, pulverised fuel ash, limestone filler and ground granulated blast-furnace slag. In total, more than 1000 samples have been manufactured for experimental research on compressive strength, flexural behaviour of steel fibre reinforced concrete and pullout behaviour of hooked end steel fibres from cement based matrices. The effects of various parameters, such as water/binder ratio, cement replacement material type and level, hooked end shape and tensile strength of fibre on fibre-matrix pullout behaviour were determined. The results of tests and analysis indicated that improving hook shape of fibre increase the pullout strength by more than 200% and using cement replacement materials significantly influence the pullout behaviour which would be useful for the optimisation of steel fibre reinforced concrete and supporting the standardisation of pullout test. In order to investigate the performance of steel fibre reinforced concrete in an application which this material has not been used before, mechanical properties of steel fibre reinforced concrete including compressive, tensile and flexural strength properties were experimentally determined. The results were also input into finite element modelling software package DIANA in order to define the material and to model the behaviour of jacking pipes under crushing load. A laboratory-scale research was conducted on steel fibre reinforced concrete pipes. The results show a 100% improvement in maximum crushing load with inclusion of fibres compared to the plain concrete. Full-scale jacking pipes including pipes with 450-1200 mm diameter and various reinforcement systems were also tested in accordance to BS EN 1916. According to the testing and modelling analysis, in order to use steel fibre as sole reinforcement and to achieve the crushing test criteria of the relevant standard, either the mechanical properties of the material or the geometrical properties of pipes needed to be amended. Full and partial replacement of bar reinforcement by type IV steel fibres were considered as well as the potential to increase the level of cover of reinforcing bar in order to produce pipes meeting higher exposure classes. The designs obtained present the possibility of production of pipes meeting higher durability/service life requirements than is possible with the existing products. The outcome of this research may be useful to widen the potential applications of the material across civil engineering.

Subjects/Keywords: Steel fibre; cement replacement material; pullout

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Malaki Zanjani, E. (2019). Enhancing the performance of cementious composite through hooked end steel fibres and cement replacement materials. (Doctoral Dissertation). University of Portsmouth. Retrieved from https://researchportal.port.ac.uk/portal/en/theses/enhancing-the-performance-of-cementious-composite-through-hooked-end-steel-fibres-and-cement-replacement-materials(46961d6f-d70d-4a48-98f6-52d6ef464533).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.780935

Chicago Manual of Style (16th Edition):

Malaki Zanjani, Elyas. “Enhancing the performance of cementious composite through hooked end steel fibres and cement replacement materials.” 2019. Doctoral Dissertation, University of Portsmouth. Accessed October 17, 2019. https://researchportal.port.ac.uk/portal/en/theses/enhancing-the-performance-of-cementious-composite-through-hooked-end-steel-fibres-and-cement-replacement-materials(46961d6f-d70d-4a48-98f6-52d6ef464533).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.780935.

MLA Handbook (7th Edition):

Malaki Zanjani, Elyas. “Enhancing the performance of cementious composite through hooked end steel fibres and cement replacement materials.” 2019. Web. 17 Oct 2019.

Vancouver:

Malaki Zanjani E. Enhancing the performance of cementious composite through hooked end steel fibres and cement replacement materials. [Internet] [Doctoral dissertation]. University of Portsmouth; 2019. [cited 2019 Oct 17]. Available from: https://researchportal.port.ac.uk/portal/en/theses/enhancing-the-performance-of-cementious-composite-through-hooked-end-steel-fibres-and-cement-replacement-materials(46961d6f-d70d-4a48-98f6-52d6ef464533).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.780935.

Council of Science Editors:

Malaki Zanjani E. Enhancing the performance of cementious composite through hooked end steel fibres and cement replacement materials. [Doctoral Dissertation]. University of Portsmouth; 2019. Available from: https://researchportal.port.ac.uk/portal/en/theses/enhancing-the-performance-of-cementious-composite-through-hooked-end-steel-fibres-and-cement-replacement-materials(46961d6f-d70d-4a48-98f6-52d6ef464533).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.780935

3. Hosein, Yara K. The Effect of Stem Surface Treatment and Substrate Material on Joint Replacement Stability: An In-Vitro Investigation into the Stem-Cement Interface Mechanics under Various Loading Modes.

Degree: 2013, University of Western Ontario

Mechanical loosening is a common mode of joint replacement failure. For cemented implants, loosening at the implant-cement interface may be affected by stem surface design. Altering the surface topography facilitates the infiltration of bone cement onto the stem, creating a mechanical interlock, improving interface stability. However, few in-vitro studies have investigated this. Therefore, the purpose of this thesis was to investigate the effect of stem surface treatments and substrate materials on stem-cement interface stability in-vitro. Four separate studies were performed to assess the stability of various stem surface treatments, with two substrate materials, under three loading modes. Titanium and cobalt chrome implant stems were custom machined and treated with one of four surfaces: smooth, sintered beads, plasma spray, and circumferential grooves. Sintered bead and plasma sprayed stems were tested in independent torsion, compression and bending; circumferential groove designs were compared in torsion and then compression. All stems were potted in aluminum tubes using PMMA, and loaded cyclically using a materials testing machine. A custom optical tracking system (resolution under 5 μm) was validated for use, and subsequently employed to measure stem-cement interface motion during loading. Overall, results showed surface treatments improved stability, but this was affected by substrate material. Across all loading modes, beaded treatments applied to titanium stems, and plasma spray treatments applied to cobalt chrome stems, improved interface stability and strength when large surface treatment areas were employed. Additionally, the machining of circumferential grooves onto the stem surface improved interface strength in compression, with no influence in torsion. A final study was performed using μ-CT imaging to observe stem and cement motion under bending loads. A custom-built loading device applied static loads to smooth titanium stems, while acquiring CT images of the stem-cement interface. Interface motion was quantified by comparing scans before and after the stem underwent cyclic loading. Results indicated the stem and the surrounding cement had displaced following loading, yet the stems remained relatively stable. These studies offer valuable information regarding the effect of stem surface treatments on stem-cement interface mechanics under various loading modes and will be used in the development of future implant systems.

Subjects/Keywords: joint replacement system; implant design; stem surface treatment; stem material; stem-cement interface; implant stability; Biomechanics and Biotransport

replacement system, ensuring appropriate alignment during implantation. Once inserted, a cement… …2004; Navarro et al., 2008), with the goal of providing a suitable material replacement… …1 1.1 Joint Replacement Systems… …12 1.2.2 Stem Substrate Material… …Stem-Cement Interface Micromotion In Stemmed Implant Components .... 48 2.1 Introduction… 

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Hosein, Y. K. (2013). The Effect of Stem Surface Treatment and Substrate Material on Joint Replacement Stability: An In-Vitro Investigation into the Stem-Cement Interface Mechanics under Various Loading Modes. (Thesis). University of Western Ontario. Retrieved from https://ir.lib.uwo.ca/etd/1479

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Hosein, Yara K. “The Effect of Stem Surface Treatment and Substrate Material on Joint Replacement Stability: An In-Vitro Investigation into the Stem-Cement Interface Mechanics under Various Loading Modes.” 2013. Thesis, University of Western Ontario. Accessed October 17, 2019. https://ir.lib.uwo.ca/etd/1479.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Hosein, Yara K. “The Effect of Stem Surface Treatment and Substrate Material on Joint Replacement Stability: An In-Vitro Investigation into the Stem-Cement Interface Mechanics under Various Loading Modes.” 2013. Web. 17 Oct 2019.

Vancouver:

Hosein YK. The Effect of Stem Surface Treatment and Substrate Material on Joint Replacement Stability: An In-Vitro Investigation into the Stem-Cement Interface Mechanics under Various Loading Modes. [Internet] [Thesis]. University of Western Ontario; 2013. [cited 2019 Oct 17]. Available from: https://ir.lib.uwo.ca/etd/1479.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hosein YK. The Effect of Stem Surface Treatment and Substrate Material on Joint Replacement Stability: An In-Vitro Investigation into the Stem-Cement Interface Mechanics under Various Loading Modes. [Thesis]. University of Western Ontario; 2013. Available from: https://ir.lib.uwo.ca/etd/1479

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.