Journal of Northeastern University(Natural Science) ›› 2024, Vol. 45 ›› Issue (3): 407-414.DOI: 10.12068/j.issn.1005-3026.2024.03.013
• Resources & Civil Engineering • Previous Articles Next Articles
Received:
2022-07-19
Online:
2024-03-15
Published:
2024-05-17
Contact:
Meng CHEN
About author:
CHEN Meng, E-mail: cmwhut@163.comCLC Number:
Meng CHEN, Yu HONG. Test Study on Drying Shrinkage Properties of Engineered Cementitious Composites with RTP‐PVA Hybrid Fibre[J]. Journal of Northeastern University(Natural Science), 2024, 45(3): 407-414.
纤维类型 | 长度/mm | 直径/μm | 密度/(g·cm-3) | 抗拉强度/MPa | 弹性模量/GPa |
---|---|---|---|---|---|
RTP | 5.2±2.4 | 21.4±4.4 | 1.476±0.003 | 761±115 | 3.8±0.7 |
PVA | 12 | 40 | 1.3 | 1 560 | 41 |
Table 1 Physical and mechanical properties of fibres
纤维类型 | 长度/mm | 直径/μm | 密度/(g·cm-3) | 抗拉强度/MPa | 弹性模量/GPa |
---|---|---|---|---|---|
RTP | 5.2±2.4 | 21.4±4.4 | 1.476±0.003 | 761±115 | 3.8±0.7 |
PVA | 12 | 40 | 1.3 | 1 560 | 41 |
材料类型 | m/ kg | 体积分数/% | RTP纤维替代率/% | |||||
---|---|---|---|---|---|---|---|---|
水泥 | 粉煤灰 | 硅砂 | 水 | 减水剂 | RTP纤维 | PVA纤维 | ||
P2.0R0 | 42.5 | 676 | 451 | 335 | 4.96 | 0 | 2.0 | 0 |
P1.75R0.25 | 42.5 | 676 | 451 | 335 | 4.96 | 0.25 | 1.75 | 12.5 |
P1.5R0.5 | 42.5 | 676 | 451 | 335 | 4.96 | 0.5 | 1.5 | 25 |
P1.25R0.75 | 42.5 | 676 | 451 | 335 | 4.96 | 0.75 | 1.25 | 37.5 |
P1.0R1.0 | 42.5 | 676 | 451 | 335 | 4.96 | 1.0 | 1.0 | 50 |
Table 2 Mixture proportions of materials ECC
材料类型 | m/ kg | 体积分数/% | RTP纤维替代率/% | |||||
---|---|---|---|---|---|---|---|---|
水泥 | 粉煤灰 | 硅砂 | 水 | 减水剂 | RTP纤维 | PVA纤维 | ||
P2.0R0 | 42.5 | 676 | 451 | 335 | 4.96 | 0 | 2.0 | 0 |
P1.75R0.25 | 42.5 | 676 | 451 | 335 | 4.96 | 0.25 | 1.75 | 12.5 |
P1.5R0.5 | 42.5 | 676 | 451 | 335 | 4.96 | 0.5 | 1.5 | 25 |
P1.25R0.75 | 42.5 | 676 | 451 | 335 | 4.96 | 0.75 | 1.25 | 37.5 |
P1.0R1.0 | 42.5 | 676 | 451 | 335 | 4.96 | 1.0 | 1.0 | 50 |
材料类型 | 双曲线模型 | 单对数模型 | 指数模型 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
a | b | R2 | ?2×104 | c | d | R2 | ?2×104 | f | g | R2 | ?2×104 | |
P2.0R0 | 19.21 | 4.68 | 0.973 | 10.52 | 0.25 | 5.09 | 0.938 | 23.92 | 1.04 | -0.22 | 0.992 | 3.30 |
P1.75R0.25 | 18.25 | 4.63 | 0.968 | 11.33 | 0.20 | 4.86 | 0.931 | 24.74 | 1.05 | -0.23 | 0.990 | 3.58 |
P1.5R0.5 | 18.17 | 4.85 | 0.968 | 11.28 | 0.03 | 4.85 | 0.934 | 23.52 | 1.06 | -0.22 | 0.989 | 3.72 |
P1.25R0.75 | 17.22 | 5.11 | 0.966 | 10.68 | -0.14 | 4.59 | 0.935 | 20.79 | 1.06 | -0.22 | 0.987 | 3.90 |
P1.0R1.0 | 17.30 | 5.58 | 0.955 | 14.60 | -0.47 | 4.63 | 0.925 | 24.30 | 1.08 | -0.21 | 0.980 | 6.46 |
Table 3 Fitness parameters and correlation coefficient of different predicting models
材料类型 | 双曲线模型 | 单对数模型 | 指数模型 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
a | b | R2 | ?2×104 | c | d | R2 | ?2×104 | f | g | R2 | ?2×104 | |
P2.0R0 | 19.21 | 4.68 | 0.973 | 10.52 | 0.25 | 5.09 | 0.938 | 23.92 | 1.04 | -0.22 | 0.992 | 3.30 |
P1.75R0.25 | 18.25 | 4.63 | 0.968 | 11.33 | 0.20 | 4.86 | 0.931 | 24.74 | 1.05 | -0.23 | 0.990 | 3.58 |
P1.5R0.5 | 18.17 | 4.85 | 0.968 | 11.28 | 0.03 | 4.85 | 0.934 | 23.52 | 1.06 | -0.22 | 0.989 | 3.72 |
P1.25R0.75 | 17.22 | 5.11 | 0.966 | 10.68 | -0.14 | 4.59 | 0.935 | 20.79 | 1.06 | -0.22 | 0.987 | 3.90 |
P1.0R1.0 | 17.30 | 5.58 | 0.955 | 14.60 | -0.47 | 4.63 | 0.925 | 24.30 | 1.08 | -0.21 | 0.980 | 6.46 |
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