CAJ | 학술논문

以室内风洞试验机为主要设备,研究了液化玉米秸秆及液化玉米秸秆基聚氨酯作为固沙剂对建筑渣土的保护效应.研究结果表明,二者均能粘结土样表面的大小颗粒形成保护层,提高建筑渣土的抗风蚀性;当液化玉米秸秆的喷施量较低时,随着风速的提高,对土壤的保护作用逐渐消失,土壤的侵蚀度迅速增加;液化玉米秸秆基聚氨酯作为固沙剂的效果要明显优于液化玉米秸秆,当其喷施量为120.37g/m~2时,起沙风速超过20m/s,当固沙效果相同时,液化玉米秸秆基聚氨酯的用量仅是液化玉米秸秆的50%,而且由于液化玉米秸秆基聚氨酯保护层的机械强度较高,使其在较高的风速下,对建筑渣土仍有很好的保护作用.
이실내풍동시험궤위주요설비,연구료액화옥미갈간급액화옥미갈간기취안지작위고사제대건축사토적보호효응.연구결과표명,이자균능점결토양표면적대소과립형성보호층,제고건축사토적항풍식성;당액화옥미갈간적분시량교저시,수착풍속적제고,대토양적보호작용축점소실,토양적침식도신속증가;액화옥미갈간기취안지작위고사제적효과요명현우우액화옥미갈간,당기분시량위120.37g/m~2시,기사풍속초과20m/s,당고사효과상동시,액화옥미갈간기취안지적용량부시액화옥미갈간적50%,이차유우액화옥미갈간기취안지보호층적궤계강도교고,사기재교고적풍속하,대건축사토잉유흔호적보호작용.
As sandy fixation materials to protect building residue soil (BRS) from wind erosion,liquefied corn stover (LCS) and polyurethane based on LCS were investigated by a wind tunnel. The results indicated that various particles on the soil surface are connected by LCS or polyurethane to form a protective crust which increases the soil resistance to wind erosion. At a low spraying amount of LCS, with an increase of wind speed, the protective action of LCS to the BRS disappears gradually due to low mechanical strength of LCS crust, and wind erosion ratio widely increases. Compared with LCS, the polyurethane is a more effective sandy fixation material. The threshold wind velocity of BRS is morn than 20m/s at a polyurethane spraying amount of 120.37g/m~2; at a same protective action, the amounts of polyurethane used is a half of LCS's. Moreover, at a high wind speed, the protective action of polyurethane is still good due to a more mechanical strength of polyurethane crust.