Dissertation > Excellent graduate degree dissertation topics show

Study on Cement Mortar for Repair Used in the Environment of Corrosion with Chloride and Sulfate

Author: LiWenXiu
Tutor: LanMingZhang
School: Beijing University of Technology
Course: Materials Science
Keywords: repair mortar redispersible powder chloride ion penetration corrosion Polymer powder
CLC: TU578.1
Type: Master's thesis
Year: 2009
Downloads: 233
Quote: 2
Read: Download Dissertation

Abstract


As the development of economy, the concrete buildings of our country become more and more complex. The reinforced concrete or pre-stressed concrete in the coast and cross areas, the harmful ion of the environmental caused the steel corrosion, and make the concrete protective layer bursting, causing the durability problem of marine concrete structures, it would be very troublesome to repair, or impossible to repair, so, the repair of cement concrete structures under the marine environment was extremely urgency.Based on the study to the performance of different systems of cementitious materials, the paper determined the ratio of cementitious materials, then chose suitable additives of dry mixed mortar, confected the polymer repair mortar used in the environment of sulfate and chloride.Then research the influence of the ratio of sand and lime, defoamer and redispersible powder to the basic mechanics performance of repair mortar. The results showed that: defoamer could improve the compressive strength and flexural strength of repair mortar significantly. With the increase of C/S, the compressive strength, flexural strength and bond strength were increased gradually. With the increase of the amount of redispersible powder, the bond strength of repair mortar was increased. Compared the redispersible powder at the same level, we found that: The effects of different redispersible powder on bond strength of repair mortar were b> a.Research different of kinds and amount of redispersible powder resistence the chloride ion penetration with the method of ASTM C1202、NEL and RCM, resistence sulfate and marine erosion performance, The results showed that: redispersible powder and cellulose ether can both improve the performance of resistence the chloride ion penetration of repair mortar, and improve the performance of resistence sulfate and marine erosion in short period.The mix of repair mortar: In the rich Portland cement system, when the proportion of sulphoaluminate cement, Portland cement, fly ash was respectively 8%, 77% and 15%, the amount of anhydrous gypsum and CSA Expansive Agent was 0.4% and 8% of the content of Sulphoaluminate and Portland cement, and the proportion of redispersible powder, Cellulose ether and triethanolamine was respectively 4%, 0.2% and 3%, the properties of repair mortar were the best.

Related Dissertations

  1. Preparation of Micro-Arc Oxidation Ceramic Coating on Mg Alloy and the Research of Galvanic Corrosion,TG174.453
  2. Anti-corrosion Property of Flake Zinc Epoxy Coating Doped with Rare Earth in SRB,TQ630.1
  3. Temperature and Pressure Drop Analysis and Its Application in CO2 Corrosion Evaluation of Subsea Pipeline,TE832
  4. Study on Screening of Bacterial Quorum Sensing from Plant Extraction and Their Inhibitions on Biofilm Formation,Q93
  5. Research on Electrochemical Synthesis and Application of Conductive Polyaniline,O633.21
  6. Research on Caster Oil-based Cold Rolling Oil,TE666
  7. Influence of Various PH and the Treating Time on Mechanical Property and Surface Structure of Ni-ti Orthodontic Wire,R783.5
  8. Electroless Ni-Pon the Bulk Nanocrystalline Ingot Iron,TQ153.1
  9. Failure Analysis on Superheat Section Connecting Pipe Flange of Ethylene Cracking Furnace,TQ221.211
  10. Study on the Silicone Modified Acrylic and Water-borne Anti-corrosion Coatings,TQ637
  11. Study on Corrosion Resistance and Condensation Property of Ni-P/Nano SiO2 Composite Coatings,TG174.4
  12. Study on Process of RE-boronizing for Q235 Steel and Boride Layer Anti-corosion Property in Aluminum Melt,TG156.87
  13. Study of the Effect of High Voltage Transmission Lines on Buried Metal Pipeline Corrosion,TE988
  14. Study of Microbial Corrosion in Central Air-conditioning Cooling Water System,TU831.4
  15. Preparation, Characterization and Performance of the Bio-coatings on the Surface of Pure Titanium Based on Micro Arc Oxidation,R318.08
  16. 2205 Corrosion Research,TG142.71
  17. 316LN austenitic stainless steel stress corrosion cracking of welded joints,TG407
  18. Investigation on Flow Accelerated Corrosion of Carbon Steels for Pwr Secondary Piping,TL334
  19. Pulse Nanocomposite Coatings Preparation and Properties,TQ153
  20. Magnesium alloy arc ion plating metal nitride thin films,TG174.444
  21. NiTi shape memory alloy Laser Reactive Synthesis of porous coating,TG178

CLC: > Industrial Technology > Building Science > Building Materials > Waterproof,moisture-proof material,caulking,sealing materials > Caulking , sealing materials > Mortar
© 2012 www.DissertationTopic.Net  Mobile