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Study of Repair Mortar Containing Titanium Slag Composite Slag

Author: SuDuXi
Tutor: ChenJianXiong
School: Chongqing University
Course: Materials Science and Engineering
Keywords: Durability Repair Mineral admixtures Bond Interface agent
CLC: TU528
Type: Master's thesis
Year: 2008
Downloads: 126
Quote: 0
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Abstract


In today's harsh ecological environment, weather and overloaded with a variety of different use of the environment, such as highway, marine, hydraulic, acid rain, carbonization growing environmental load environment, civil engineering, construction of concrete structures, a serious shortage of the life cycle, its durability and safety. Maintenance and repair costs of high-speed doubled at the same time, all kinds of waste residue displacement greatly increased, the need for timely treatment. The study efficient use of the slag preparation of new repair materials, can effectively solve the above problems. Inefficient use of titanium slag, lithium slag, limestone powder as the main raw materials, designed to improve the efficiency of their utilization, increase its value added, to improve the environment, and the maintenance and repair of concrete structures meet different environmental conditions under guarantee structure to maintain the useful life durability and security at the same time, and then get a good economic and environmental benefits. The present study was conducted in the existing research results (such as titanium slag with ultra-finely ground limestone powder composite admixture preparation of cement with a small amount of ultra-high-strength concrete [1]; slag, silica fume and titanium slag and other materials by a certain proportion of mixed grinding from a composite ultra-fine mineral powder, at the same time to reduce the amount of cement and improve concrete sulfate resistance and resistance to acid rain ability, is to improve the effective measures of concrete durability in harsh environments [2]) on the basis of superplasticizer and a variety of mineral the powder admixture complex doped \powder, and for the different characteristics of the material, ultra-fine grinding and admixtures modified. The superfine powder composite technology to study the compounding effect of different mineral admixtures and composite admixture preparation process, admixtures, repair mortar properties, mechanical properties, bond strength, abrasion resistance and shrinkage impact. This study under laboratory conditions screened five repair mortar, the results showed that: the titanium slag can be used as ordinary portland cement-based repair mortar admixtures effective component. Admixture with titanium slag equal amounts to replace the 20% to 30% of the cement can be prepared by the system out of the good performance of high strength repair mortar. Titania slag and other mineral admixtures such as slag, lithium slag, fly ash, limestone powder complex doped, the same amount to replace 20% to 50% of cement can be formulated excellent performance, high strength repair mortar. The incorporation of titanium slag can improve the flexural strength of the repair mortar, reduce the brittleness of the repair mortar. Prepared repair mortar for concrete pavement, building repair. The flexural strength of the adhesive bond performance assessment index as the new and old material. Formulated three repair materials to repair the broken titanium slag composite slag mortar bonded flexural strength test results show that the new and old mortar has good adhesion properties. 28d bonding lowest flexural strength of 5.7 MPa, and up to 6.9 MPa. The titanium slag composite slag patching mortar has good durability. Titanium slag can reduce drying shrinkage of the mortar to improve the wear resistance of the mortar. Complex doped lithium slag can further improve the wear resistance of the mortar, reduce drying shrinkage, and its intensity is higher, can be used for strength, wear higher requirements for road surface repair.

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CLC: > Industrial Technology > Building Science > Building Materials > Non-metallic materials > Concrete and concrete products
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