Research Development of Polymer Modified Cement Based Materials
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The common concrete and cement mortar have many advantages,but their poor permeability resistances,under the action of corrosive medium,the service life was shorten. Joining the polymer is an effective way to solve this problem. Furthermore,polymer can significantly improve the performance of the cement-based materials. The kinds of polymer are introduced in modified cement mortar and concrete. The modified mechanism and application of polymer cement based materials are discussed. The problems and future applications of polymer cement based materials are pointed out.Keywords:
Polymer Concrete
Service life
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From viewpoint of material science, and based on the applying experience, three main factors such as the lower-flow-back of cement slurry, the bulk shrinkage and the high fragility of cement stone, which affect zonal bonding quality of cement sheath, are expatiated through analyzing congenital defect of oil well cement and the properties of additive. On the basis of discussing novel material function mechanism, settled project is put forward primarily and novel material field applications are introduced. The technique requirement of cementing material for domestic oilfield and the future ways of research are proposed.
Shrinkage
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Superabsorbent polymer
Frost (temperature)
Silica fume
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Mortar cement is a hydraulic cement similar to masonry cement in use and function, introduced to enhance one or more of the latter's properties, such as workability, durability, and water retention. In addition, mortar cement must have lower air content and it has minimum flexural bond strength requirements. In response to fulfilling these needs, a new family of water soluble polymers has been developed. The new polymer additives are designed to optimize air void distribution and rheology of wet mortar, allowing improved workability with low air content. Furthermore, these polymers impart high water retention to the mortar, and allow the production of mortar with enhanced board life and flexural bond strength.
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The Innovative Performance of Polymer Modified Cement Systems for Use in Infrastructure Applications
This paper discusses the innovative performance of polymer modified cement mortar in comparison with conventional cement mortar particularly when exposed to severe environmental conditions. The effect of cyclic exposure to air and salt water environment increases deterioration process resulting in a high cost of maintenance and repair. The use of ordinary Portland cement system alone in severe environmental condition may not be effective, and cannot provide long term solutions because the problems of concrete deterioration will exist after a shorter period of time. Hence, there is the need to consider alternative modifications, and the polymer modified cement system can offer not only enhanced engineering properties but also high durability performance. The research have shows that, the polymer modified cement mortars have been found to improve not only the flexural strength of the mortar matrix, but also enhance the durability characteristics of the material by reducing the water absorption, shrinkage and expansion, modulus of elasticity and chloride permeability
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Air entrainment
Polymer Concrete
Properties of concrete
Properties of water
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The physical structure of cement is of pivotal importance in the study of volumetric stability and cracking of concrete. While most of efforts in the category of crack mitigation of concrete have been devoted to the incorporation of sophisticated chemical admixtures into concrete mixtures, less attention has been paid to the fact that the modification of cement structure can be considered as a sustainable solution to this problem. This study aims to investigate the effect of the modification of the physical structure of cement on workability, early-age strength and autogenous shrinkage of cement pastes. The results show that the modification of cement physical structure can be used as a sustainable route to reduce shrinkage of cementitious materials.
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Cementitious
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Polymer Concrete
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Decades ago, an implantation of polymer into concrete has taken an effect in Concrete Polymer Composites, C-PC – new concrete classes and since that time a constant development polymers in concrete technology has been observed. The object of the study in short definition has been described and classified. The meaning of polymer better concrete as well as how polymer improves the concrete has been explained. It has been analyzed and stressed that the polymer function in concrete is much higher than one could deduct from their mass share. The reason for that is synergy effect – the result of cooperation of polymers with other components of concrete. The recognition and using of synergic effects is the main but not only one direction of research works. The polymer in concrete product to be attractive on the market should fit up away growing demands of application and be based on the current status of knowledge. It means persistent and online resolving Material Model – Performance Model relation. Long time study on the modelling of cement hydration and polymer hardening process in Polymer Cement Concrete proved how significant is the idea/theory in technology development. Currently great expectation has been demonstrated towards Water-Soluble Polymers, WSP as nanomodifier of great potentiality. Various types of polymers in various amounts can be used for C-PC; even the polymer of the same type can be differentiated by the structure of polymer chain (length, branching) – this creates almost unlimited area of the control performance of C-PC. Outcome of the past ASPIC and ICPIC Congresses confirms that the research efforts have been always oriented on the engineering results based on the material microstructure understanding. The role of polymers in concrete could be not overestimated.
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Properties of concrete
Polymer Concrete
Branching (polymer chemistry)
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OPC and BFS cement concrete: Correlation of electrochemical parameters and microstructural characteristicsThis paragraph reports on the electrochemical behavior of construction steel (FeB500 HKM), correlated with microstructural characterization of the bulk matrix in reinforced concrete, www.intechopen.com
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