Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 63 for “"ordinary portland cement"”.
-
Investigating mechanical properties of ordinary portland cement. Investigating improvements to the mechanical properties of Ordinary Portland Cement (OPC) bodies by utilizing the phase transformation properties of a ceramic (Zirconia).
… tetragonal zirconia on the properties of Ordinary Portland Cement were observed during which the effect of crystallite size pH on the preparation solution, precursor salt, and the presence of co-precipitates, Fe(OH)3, SnO2 and SiO2 on the crystallization temperature, enthalpy and crystal …
-
Influence of lightweight aggregate and calcium sulfoaluminate cement on deformation of ordinary Portland cement mortar and concrete
… (LWA) and usage of calcium sulfoaluminate (CSA) cement are two common methods applied in shrinkage mitigation. Pre-soaked LWA supplies additional moisture to cement paste during hydration, thereby compensating for the water consumption that occurs during hydration and drying. CSA cement induces …
-
Incorporation Of High-Volume Fly Ash To Produce Structural Lightweight Concrete
… proportion and volume of our natural resources. Ordinary Portland Cement is an important source for the emission of carbon dioxide into the atmosphere because of burning fuel and raw materials’ decomposition during the production process of cement. Due to the increasing demand in concrete, one of …
-
The characterization of novel cements
… physical characterization of macrodefect free cements produced by ICI. These materials are made through a specialized mixing technique which incorporates an organic polymer into the cement/water system. The high mechanical strength and low porosity of this class of hardened cement paste had …
-
Utilizing of Magnesium Oxysulfate Binders for Additive Construction Applications
… Oxysulfate (MOS) binder as an alternative to the ordinary Portland cement (OPC) to be utilized in terrestrial and extraterrestrial additive construction (AC) fields. MOS paste and mortar are characterized physically, chemically, and mechanically. The characterization results conducted in this …
-
Analysis and reproduction of geopolymer concrete
… and more environmentally friendly alternative to ordinary Portland cement (OPC) concrete. Based on Joseph Davidovits' recipe for geopolymer concrete, we varied the ratios of the materials in an attempt to produce the ideal formula for the concrete that withstands maximum compressive strength. …
-
Performance and mechanism on a high durable silica alumina based cementitious material composed of coal refuse and coal combustion byproducts
… solid waste through activation as substitute for ordinary Portland cement. The central goal of this dissertation is to investigate and develop a new silica-alumina based cementitious material largely using coal refuse as a constituent that will be ideal for durable construction, mine backfill, …
-
The adsorption of phenolic and organotin compounds by clays and cation exchanged clays
… of ground granulated blast furnace slag and ordinary Portland cement attenuates 2-chlorophenol more effectively than ordinary Portland cement alone. Tetramethyl ammonium- (TMA-) and tetramethyl phosphonium- (TMP-) montmorillonites were exposed to solutions of phenol or chlorinated phenols. …
-
Aqueous reactivity of glassy industrial byproducts in alternative cementitious systems
… to curb the carbon footprint associated with ordinary Portland cement (OPC). CO₂ emissions inherent to source-material processing (i.e., firing of limestone at 1450 °C) and annual OPC production volumes of 4.1 billion metric tons cause an estimated 5-11% of global annual greenhouse gas (GHG) …
-
Prospective retarders for alkali-activated slag: stability at high alkalinity, effects on setting behavior and strength of paste
… the carbon emissions caused by manufacture of ordinary Portland cements. Geopolymers or alkali-activated systems with precursors as fly ash, slag or metakaolin, or a mixture of these, are possible substitutes. There are several hindrances to their use in construction due to the lack of …
-
On the Development of 8,000 psi Geopolymer Mortar for Practical Use in Field Applications
… use of geopolymer binder as an alternative to ordinary portland cement in concrete materials, it is not widely used in field applications. Geopolymer materials have no set guidelines for mixture design and often require heat curing to facilitate strength gain. Additionally, many geopolymers are …
-
Nano-ChemoMechanical assessment of Rice Husk Ash cement by wavelength dispersive spectroscopy and nanoindentation
Cement global production stands at 3 Giga tons making concrete the most consumed structural mateial worldwide. This massively produced material comes with a heavy environmental footprint rendering the cement industry contributing about 5% to global CO₂ emission. Rice Husk Ash (RHA) among many other …
-
CORROSION RESISTANCE PERFORMANCE INVESTIGATION OF MILD STEEL BAR COATED WITH MAGNESIUM PHOSPHATE CEMENT PASTE
… study, the anti-corrosion mechanism of reinforcement embedded in magnesium potassium phosphate cement (MKPC) is explored. In addition, one type of additives, metakaolin, and one type of retarder, boric acid, are employed in MKPC to modify its properties in order to further investigate corrosion …
-
Sustainable cementitious materials for building and sorption applications
<p>"Ordinary Portland Cement (OPC) is the most widely used cement material, but it contributes over 8% of the global CO<sub>2</sub> emission and the process is energy intensive. Moreover, OPC faces durability challenges, particularly in aggressive environments. Hence, there is rapidly increasing …
-
Effect of blast-furnace slag as cement replacement on hydration, microstructure, strength and durability of concrete
… during the last years. Also in the concrete and cement industry, attempts are made to minimize the environmental impact. One way to implement this thought, is the use of industrial by-products as cement replacing material. The 'waste' products are upgraded in high-value applications and the need …
-
The influence of various South African aggregates on the creep of concrete
… These include Admixtures, Eastern Province Cement and Heat-curing. A computer program, CONVERS3, was developed in order to convert experimental results from the form of specific creep to that of creep factor, thereby making the data more accessible for comparison purposes. In order to allow …
-
Characterization of pozzolanic cement for radioactive waste disposal
… chemical and physical properties of pozzolanic cement. The principle objective of this research was to determine whether pozzolanic cement is a suitable material for permanently encasing high-level radioactive waste (HLW) and spent-nuclear fuel (SNF) in disposal canisters. This particular cement …
-
Development of instrumented oedometer incorporated with bender element and electrical conductivity
… dredged marine clay and refined kaolin. Ordinary Portland cement was used at 5 %, 10 % and 15 % by dry weight of soil as a solidification agent. All specimens were mixed at twice the liquid limit. Prior to testing, all solidified specimens were cured for 7 days. It was found that Vs …
-
The reuse of the algerian petroleum sludge as alternative raw material for cement production
… materials (AFR) to produce different types of cement like Ordinary Portland Cement (OPC), Portland Pozzolana Cement (PPC), Low Heat Cement and others. This incorporation is to avoid harmful impacts of AFR and to produce alternative sustainable cement. In this study, petroleum sludge (PS) waste, …
-
Characterization and utilization of alkali-activated concrete for sustainable infrastructures
… consumption during the production process of ordinary Portland cement. Class C FAs, sourced from Labadie, Jeffery City, Kansas City, Thomas Hill, and Sikeston power plants in the state of Missouri, were used to synthesize the AAC. Sodium silicate (SS), Na2SiO3, and sodium hydroxide (SH), NaOH …
Page 1 of 4