[1]范颖芳,张均良,李秋超.纳米偏高岭土对水泥砂浆断裂性能影响的试验研究[J].东南大学学报(自然科学版),2020,50(4):637-644.[doi:10.3969/j.issn.1001-0505.2020.04.006]
 Fan Yingfang,Zhang Junliang,Li Qiuchao.Experimental study on the effect of nano-metakaolin on the fracture behavior of cement mortar[J].Journal of Southeast University (Natural Science Edition),2020,50(4):637-644.[doi:10.3969/j.issn.1001-0505.2020.04.006]
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纳米偏高岭土对水泥砂浆断裂性能影响的试验研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
50
期数:
2020年第4期
页码:
637-644
栏目:
材料科学与工程
出版日期:
2020-07-20

文章信息/Info

Title:
Experimental study on the effect of nano-metakaolin on the fracture behavior of cement mortar
作者:
范颖芳张均良李秋超
大连海事大学土木工程系, 大连116026
Author(s):
Fan Yingfang Zhang Junliang Li Qiuchao
Department of Civil Engineering, Dalian Maritime University, Dalian 116026, China
关键词:
纳米偏高岭土 水泥砂浆 切口梁 断裂 强度
Keywords:
nano-metakaolin cement mortar notched beam fracture strength
分类号:
TU578.1
DOI:
10.3969/j.issn.1001-0505.2020.04.006
摘要:
为了探明纳米偏高岭土对水泥基材料断裂性能的影响规律,采用5种纳米偏高岭土质量分数(1%、3%、5%、10%、15%),制备了纳米偏高岭土水泥砂浆切口试验梁,完成了带切口纳米偏高岭土水泥砂浆试件的三点弯曲试验和不同质量分数纳米偏高岭土水泥砂浆抗折、抗压强度试验.得到了不同质量分数纳米偏高岭土水泥砂浆的荷载-位移曲线及抗折、抗压强度,探讨了纳米偏高岭土对水泥砂浆断裂能、承载力、变形性能及抗折、抗压强度的影响规律.研究结果表明:当纳米偏高岭土质量分数小于5%时,砂浆试件断裂能、承载能力、变形性能、抗折与抗压强度随着纳米偏高岭土质量分数增加而逐渐增加,当质量分数为5%时断裂能为普通水泥砂浆的3.34倍;随着纳米偏高岭土质量分数的进一步增加,纳米偏高岭土水泥砂浆试件断裂能不断降低,当质量分数达到15%时,断裂能降为普通水泥砂浆的1.47倍.因此,掺加适量纳米偏高岭土能够在一定程度上提高水泥砂浆抗裂性能.
Abstract:
To examine the effect of nano-metakaolin(NMK)on the fracture behavior of cement mortar, five contents of NMK(1%, 3%, 5%, 10%, 15%)were taken into consideration. The three-point bending test was performed on the notched mortar beams with various contents of NMK additives. The rupture and compressive strength of the cement mortar with the addition of NMK were tested. The load-displacement curves of the cement mortar with various contents of NMK were obtained. The effects of NMK on the fracture energy, bearing capacity, deformation performance, rupture and compressive strength of cement mortar were discussed in detail. The results show that the fracture energy, bearing capacity, deformation performance, rupture and compressive strength of mortar increase linearly with the NMK content while the content of NMK is less than 5%. When the content of NMK is 5%, the fracture energy is 3.34 times that of ordinary cement mortar. However, with the further increase of NMK content, the fracture energy of NMK added cement mortar decreases gradually. While the content of NMK reaches 15%, the fracture energy reduces to 1.47 times that of ordinary cement mortar. Therefore, an appropriate amount of NMK can improve the fracture behavior of the cement mortar.

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备注/Memo

备注/Memo:
收稿日期: 2019-11-21.
作者简介: 范颖芳(1972—),女,博士,教授,博士生导师,fanyf@dlmu.edu.cn.
基金项目: 国家自然科学基金资助项目(51578099).
引用本文: 范颖芳,张均良,李秋超.纳米偏高岭土对水泥砂浆断裂性能影响的试验研究[J].东南大学学报(自然科学版),2020,50(4):637-644. DOI:10.3969/j.issn.1001-0505.2020.04.006.
更新日期/Last Update: 2020-07-20