混凝土無損檢測研究畢業(yè)論文

[摘要] 混凝土是我國建筑工程結(jié)構(gòu)中最主要的建筑材料?因此提高混凝土質(zhì)量檢測
水平和準(zhǔn)確性?對確保工程質(zhì)量有重大意義。無損檢測是通過混凝土非破損參數(shù)與混凝
土強(qiáng)度間的相關(guān)關(guān)系?建立測強(qiáng)曲線來推定現(xiàn)場混凝土的強(qiáng)度值。我國常用的無損檢測
方法有回彈法和超聲回彈綜合法兩種?本文就超聲回彈綜合法進(jìn)行了初步的研究。實(shí)驗(yàn)
采用南陽地區(qū)常用的地方材料?配置C15混凝土試塊?然后按不同的齡期、分別用回彈
儀、超聲儀和壓力機(jī)對試塊進(jìn)行測試?經(jīng)計(jì)算得出相關(guān)試驗(yàn)數(shù)據(jù)。通過這些數(shù)據(jù)?結(jié)合
最小二乘法原理?采用幾種典型函數(shù)模型進(jìn)行擬合運(yùn)算。并對回歸方程的顯著性進(jìn)行檢
驗(yàn)?從而更準(zhǔn)確地評價(jià)混凝土強(qiáng)度。

[關(guān)鍵詞] 混凝土?無損檢測?超聲-回彈綜合法?數(shù)據(jù)處理

The Study of Non-Destructive Testing for C15 Concrete Civil Engineering Major
Abstract: Concrete is the most important material in the construction project .Improving
the level of concrete quality test and accuracy directly affects the security of construction and
ensures the quality of engineering. Using the non-destructive testing can build the strength
curve to infer on-site concrete strength by correlation of the concrete non-destructive
parameter and the concrete strength. In our country there are two common methods of
non-destructive test: rebound hammer method and the ultrasonic-rebound combined method.
By deep research in the ultrasonic-rebound combined method in this study. Using the
common materials in Nanyang ,we made C15 concrete samples. Rebound measure instrument,
ultrasonic measure instrument and compressive machine have been applied respectively to
determine the strength in different aging. Then relatively test data have been calculated. The
test data were obtained to regress several functions by least square method. The regression
equations qualities have been examined. By using the formula, the concrete strength could be
more accurately eva luated

Key Words: Concrete?Non-destructive testing?Ultrasonic-rebound combined method?
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目 錄
1 緒論 .................................................................... 1
1.1 引言 .............................................................. 1
1.2 混凝土無損檢測技術(shù)綜述 ............................................ 1
1.3 混凝土無損檢測國內(nèi)外研究現(xiàn)狀 ...................................... 1
1.4 混凝土無損檢測技術(shù)特點(diǎn) ............................................ 2
1.5 研究混凝土無損測強(qiáng)的目的和意義 .................................... 2
1.6 本課題研究的內(nèi)容方法及意義 ........................................ 3
2 混凝土強(qiáng)度的無損檢測理論 .............................................. 4
2.1 回彈法、超聲法概述 ................................................ 4
2.2 超聲回彈綜合法原理及影響因素 ...................................... 5
3 超聲—回彈綜合法的實(shí)驗(yàn)設(shè)計(jì)研究 ........................................ 8
3.1 實(shí)驗(yàn)方案 .......................................................... 8
3.2 初步配合比及材料用量 .............................................. 8
3.3 儀器的選用 ........................................................ 9
3.4 試塊的制作和養(yǎng)護(hù) .................................................. 9
3.5 試塊的測強(qiáng) ........................................................ 9
4 混凝土無損檢測數(shù)據(jù)處理和曲線回歸分析 ................................. 12
4.1 原始數(shù)據(jù)及處理方法 ............................................... 12
4.2 原始數(shù)據(jù) ......................................................... 12
4.3 回歸分析 ......................................................... 14
4.4 回歸結(jié)果的比較 ................................................... 21
4.5 測強(qiáng)曲線之間的比較 ............................................... 22
結(jié)束語 ................................................................... 23
參考文獻(xiàn) ................................................................. 24
致謝 ..................................................................... 25