本文關(guān)鍵詞：生態(tài)多孔混凝土植物相容性研究　出處：《中南林業(yè)科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

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【摘要】：生態(tài)多孔混凝土(簡(jiǎn)稱EPC)是由單一粒級(jí)的粗骨料、水、水泥等經(jīng)適當(dāng)?shù)臄嚢韫に嚭驼駬v而成型的一種新型混凝土結(jié)構(gòu)材料。由于其特殊的骨架結(jié)構(gòu)且有效孔隙率可達(dá)30%左右,通過向其孔隙中填充泥土、營(yíng)養(yǎng)物質(zhì)、保水材料等能夠滿足植物生長(zhǎng)需求,可將其應(yīng)用于停車場(chǎng)、路邊護(hù)坡、路肩隔板等工程中并具有保持水分、吸音降噪、緩解城市熱島效應(yīng)和改善生態(tài)環(huán)境等優(yōu)勢(shì),EPC現(xiàn)已成為國(guó)內(nèi)外學(xué)者研究的熱點(diǎn)領(lǐng)域之一�；贓PC存在堿度高、強(qiáng)度低、連通孔隙率低、孔結(jié)構(gòu)分布不均勻等特性,從植被物種篩選與培育角度出發(fā),深入探討EPC與植被品種的相容性及其在EPC中的生長(zhǎng)特性,是綠色生態(tài)混凝土制備技術(shù)的瓶頸,也是制約其能否推廣應(yīng)用的關(guān)鍵,因此開展EPC植物相容性及植物在EPC中的生物學(xué)特性研究意義重大。本文的主要研究結(jié)論如下:(1)借鑒普通混凝土配合比設(shè)計(jì)原則,提出了基于體積法和比表面積法兩種可行的生態(tài)多孔混凝土配合比設(shè)計(jì)方法,并通過試驗(yàn)予以驗(yàn)證其正確性。(2)基于對(duì)生態(tài)多孔混凝土不同堿環(huán)境下的狗牙根、高羊茅、黑麥草、早熟禾的發(fā)芽率、形態(tài)特性和生長(zhǎng)量等生長(zhǎng)特性規(guī)律的研究,探明了狗牙根、高羊茅、黑麥草、早熟禾四種植被與生態(tài)多孔混凝土化學(xué)相容性的堿度臨界條件,為不同堿性環(huán)境條件下優(yōu)選不同植被品種提供了可靠的理論依據(jù)。(3)探討了耕植土、有機(jī)肥、外加劑、珍珠巖、水等主要影響因素對(duì)生態(tài)多孔混凝土植物生長(zhǎng)特性的影響程度,研究結(jié)果表明:有機(jī)肥和耕植土是影響植物萌發(fā)的主要因素。同時(shí),得出了四個(gè)草種最適應(yīng)種植材料(耕植土:有機(jī)肥:外加劑:珍珠巖:水)的最優(yōu)組合配比狗牙根(36%:11%:8%:14%:32%)、高羊茅(41%:9.8%:7%:12%:30%)、早熟禾(46%:6%:7%:12%:28%.)、黑麥草(45%:9%:6%:11%:28%),最優(yōu)組合下草種的生長(zhǎng)質(zhì)量與普通土壤基本相當(dāng)。(4)探討了狗牙根、高羊茅、黑麥草、早熟禾四種植被與生態(tài)多孔混凝土的物理相容性,生態(tài)多孔混凝土中土壤含水量為50～60%左右時(shí),四種草種的生長(zhǎng)狀況均受到不同的影響。其中,狗牙根、早熟禾在生態(tài)多孔混凝土中土壤含水量為50～60%左右時(shí)仍能較正常生長(zhǎng),表現(xiàn)出優(yōu)異的耐旱能力;黑麥草抗旱能力差,其生長(zhǎng)嚴(yán)重受到土壤含水量制約;高羊茅的生理指標(biāo)狀況隨土壤含水量的變化而變化,比較適應(yīng)于濕潤(rùn)的土壤環(huán)境。而早熟禾在土壤含水量為70～80%左右時(shí)生長(zhǎng)狀況受到顯著影響,說明其耐濕能力較差。上述研究結(jié)論為在EPC內(nèi)培育不同植被品種調(diào)制土壤含水量提供了可靠的參考依據(jù)。(5)建立了植物品種與生態(tài)多孔混凝土結(jié)構(gòu)一一對(duì)應(yīng)法則,并通過中試平臺(tái)進(jìn)行了驗(yàn)證,可為生態(tài)多孔混凝土工程應(yīng)用提供了技術(shù)指導(dǎo)。
[Abstract]:Ecological porous concrete (EPC) is composed of coarse aggregate, single grade water cement by ramming stirring process and appropriate vibration as a new type of concrete structural material. Because of its special framework and effective porosity can reach about 30%, through to the pore filling soil, nutrients, Paul water material can meet the demand of plant growth, which can be applied to the parking lot, roadside slope, shoulder plate engineering with water retention, noise reduction, ease of urban heat island effect and improve the ecological environment and other advantages, EPC has become one of the hot areas of research at home and abroad. Based on EPC has high alkalinity, low intensity, connectivity low porosity, pore structure and uneven distribution characteristics, vegetation species selection and cultivation from the perspective of in-depth study of the compatibility and growth in EPC of EPC and vegetation species, green ecological concrete The bottleneck of concrete preparation technology, the key is to restrict its application can be extended, so to carry out the study on the biological characteristics of EPC plant compatibility significance and plant in EPC major. The main conclusions are as follows: (1) using the mix design principle of ordinary concrete, the mix design method based on volume method and ecological the porous surface area method of two kinds of feasible concrete, and through the test to verify its correctness. (2) on the ecological environment of the porous concrete with different alkali bermudagrass, based on germination rate of ryegrass, tall fescue, bluegrass, growth characteristics of morphological characteristics and growth regularity of proven bermudagrass tall fescue, ryegrass and bluegrass four vegetation ecological and chemical compatibility of porous concrete critical condition of basicity, provide a reliable theoretical basis for different varieties and different vegetation under the alkaline conditions (3) on the selection. 璁ㄤ簡(jiǎn)鑰曟鍦，

本文編號(hào)：1376304