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The Research of Mechanical Properties and Ballistic Resistance of Ultra-high Strength Portland Concrete

Author: ZhangBiZuo
Tutor: CuiChong
School: Nanjing University of Technology and Engineering
Course: Materials Science
Keywords: Mechanical Properties Autoclave curing Influencing factors AGAIST Protection factor
CLC: TU528
Type: Master's thesis
Year: 2010
Downloads: 98
Quote: 1
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Abstract


Armor protection material is moving toughening, lightweight , multi-functional and efficient development . This thesis is based on the principle of the preparation of high-strength concrete aggregate of high hardness, high strength , and give full play to the activity of siliceous material physical and chemical effects in the process of structure formation in the silicate-based , preferably superplasticizer ensure ultra-high-strength silicon the formate concrete having a good workability . Add a different aspect ratio , volume ratio of steel fibers , to obtain the best ultra - high - strength silicate concrete reinforced, toughened and crack resistance effect . Portland concrete materials in a variety of molding patterns hydrothermal synthesis conditions , preparation has ultra-high-strength low-density ( compared to ceramic armor materials ) , the advantages of low cost and high toughness . The modern stereo microscope , XRD, SEM , and other physical and chemical analysis method , under to study hydrothermal synthesis process , autoclaving time on the ultra-high-strength silicate concrete hydration and hardening process, the hydration product type and morphology and structural characteristics , analysis of the relationship between the morphology and the macroscopic mechanical properties . 105 analog by 12.7mm armor-piercing incendiary bomb the vertical incidence ultra-high-strength portland concrete targets of the anti - ballistic analysis of the target plate , elastomers , backplane failure pattern , to discuss the mechanism of anti- bomb target plate , summed the ultra-high-strength silicate concrete targets protection factor influencing factors , and compared with the performance of ceramic armor . The full text of the following results : the 1 . Optimal fit than : Ⅰ type high-strength aggregate : sand : cement : silica fume : quartz powder : water reducer : water-cement ratio : steel fiber = 0.41:0.82:1:0.3 : 0.32:3 % : 0.17:3 ; 2 . based hydrothermal synthesis autoclave curing methods were prepared to obtain a compressive strength of 150 - 340MPa , flexural strength of 20-42MPa ultra - high - strength silicate concrete products ; 3 . silicate concrete target of ultra-high strength anti- 12.7mm armor-piercing incendiary protection factor of 1.75 , the anti- the 105 analog bomb protection factor of 2.17 , comparable with ordinary ceramic armor .

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