涂層改性碳纖維摻量增強混凝土性能的研究

黃汝廣

摘 要：為提升工程建筑中碳纖維增強混凝土的力學(xué)性能，在水泥基復(fù)合材料中摻入了不同長度和不同摻量的碳纖維和涂層改性碳纖維，研究碳纖維/涂層改性碳纖維長度和摻量對纖維增強水泥基復(fù)合材料抗折強度和抗壓強度的影響。結(jié)果表明：在不同碳纖維/涂層改性碳纖維長度下，隨著碳纖維/涂層改性碳纖維摻量逐漸增加，碳纖維/涂層改性碳纖維增強水泥基復(fù)合材料的抗折強度整體呈現(xiàn)逐漸增大的特征；在相同碳纖維/涂層改性碳纖維摻量下，碳纖維/涂層改性碳纖維長度越大則對應(yīng)碳纖維/涂層改性碳纖維增強水泥基復(fù)合材料的抗折強度越高；在不同碳纖維/涂層改性碳纖維長度下，碳纖維/涂層改性碳纖維增強水泥基復(fù)合材料的抗壓強度隨著碳纖維/涂層改性碳纖維摻量逐漸增加先增后減；在碳纖維/涂層改性碳纖維摻量為0.6%時取得抗壓強度最大值。適宜的碳纖維/涂層改性碳纖維摻量為0.6%。

關(guān)鍵詞：碳纖維；涂層改性碳纖維；水泥基復(fù)合材料；抗折強度；抗壓強度

中圖分類號：TU528.45；TQ342+.742

文獻標(biāo)志碼：A

文章編號：1001-5922（2023）07-0171-04

Study on performance improvement of carbon fiber reinforced concrete with coating modified carbon fiber

HUANG Ruguang

（Hezhou University，Hezhou 542800，Guangxi China

）

Abstract：In order to improve the mechanical properties of carbon fiber reinforced concrete in engineering construction，different lengths and dosages of carbon fiber and coating modified carbon fiber were added to cement-based composite materials.The effects of the length and dosages of carbon fiber/coating modified carbon fiber on the flexural and compressive strength of fiber-reinforced cement-based composite materials were studied.The results indicate that under different lengths of carbon fibers/coating modified carbon fibers，as the content of carbon fibers/coating modified carbon fibers gradually increases，the overall flexural strength of carbon fibers/coating modified carbon fibers reinforced cement-based composites shows a gradually increasing feature.At the same content of carbon fibers/coating modified carbon fibers，the longer the length of carbon fiber/coating modified carbon fiber，the higher the flexural strength of the carbon fiber/coating modified carbon fiber reinforced cement-based composite material.Under different lengths of carbon fiber/coating modified carbon fiber，as the content of carbon fiber/coating modified carbon fiber gradually increases，the overall compressive strength of carbon fiber/coating modified carbon fiber reinforced cement-based composites first increases and then decreases.The maximum compressive strength is achieved when the content of carbon fiber/coating modified carbon fiber is 0.6%.The appropriate carbon fiber/coating modified carbon fiber content is 0.6%.

Key words：carbon fiber;coating modified carbon fiber;cement based composite materials;flexural strength;compressive strength

工程建筑中多以水泥混凝土材料為主，這主要是因為其具有施工方便、抗壓強度高等特性［1-2］，但是隨著現(xiàn)代工程建筑向著大跨度、復(fù)雜環(huán)境中的應(yīng)用需求，水泥混凝土材料的脆性自重大、抗折強度低等特點在一定程度上限制了其更廣泛的應(yīng)用［3］。近年來研究熱點是將碳纖維加人到水泥基體中制成碳纖維……