畢業(yè)論文---緊密堆積混凝土配合比設(shè)計方法研究ab

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1、核準通過，歸檔資料。未經(jīng)允許，請勿外傳！摘要水泥混凝土廣泛應(yīng)用于基礎(chǔ)建設(shè)各個領(lǐng)域，隨著經(jīng)濟發(fā)展、科技進步，人們對其使用品質(zhì)要求越來越高。現(xiàn)行混凝土配合比設(shè)計方法設(shè)計的混凝土以懸浮密實型結(jié)構(gòu)為主，易在集料與水泥石粘結(jié)處發(fā)生破壞，且尚未充分發(fā)揮粗集料的作用。為此，本研究在體積法的基礎(chǔ)上，提出了粗集料緊密堆積結(jié)構(gòu)與緊密堆積型水泥混凝土概念，并對其工作性、強度特性及其設(shè)計方法開展了系統(tǒng)研究，以期節(jié)約成本，提高混凝土性能，具有重要工程實用價值。

2、粗集料緊密堆積結(jié)構(gòu)是指骨架顆粒與填充顆粒之間充分嵌鎖、緊密排列、不干涉或少干涉，使其達到合理密實狀態(tài)時形成一個多級空間骨架結(jié)構(gòu)；在此基礎(chǔ)上，利用砂填充粗集料振實剩余空隙，粉煤灰作為填充砂振實剩余空隙，再用水泥凈漿潤滑和填充混合料的剩余空隙，形成緊密堆積型水泥混凝土。綜合研究成果，提出了緊密堆積型混凝土配合比設(shè)計方法，并與現(xiàn)行設(shè)計方法對比表明，同等強度、工作性要求下，緊密堆積型水泥混凝土比現(xiàn)行設(shè)計方法確定的混凝土的經(jīng)濟性更好，且設(shè)計方法可

3、操作性強，簡便實用，可以直接應(yīng)用于工程實際。關(guān)鍵詞：水泥混凝土，工作性，強度特性，配合比設(shè)計方法9JWKffwvG#tYM*Jg&6a*CZ7H$dq8KqqfHVZFedswSyXTy#&QA9wkxFyeQ^!djs#XuyUP2kNXpRWXmA&UE9aQ@Gn8xp$R#&#849Gx^Gjqv^$UE9wEwZ#Qc@UE%&qYp@Eh5pDx2zVkum&gTXRm6X4N

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75、X4NGpP$vSTT#&ksv*3tnGK8!z89AmYWpazadNu##KN&MuWFA5uxY7JnD6YWRrWwc^vR9CpbK!zn%Mz849Gx^Gjqv^$UE9wEwZ#Qc@UE%&qYp@Eh5pDx2zVkum&gTXRm6X4NGpP$vSTT#&ksv*3tnGK8!z89AmYWv*3tnGK8!z89AmYWpazadNu##KN&MuWFA5uxY

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