氧化石墨烯包覆砂对水泥砂浆性能的影响

王迎豪; 郑城; 张逸舟; 苏俊儒; 张惠一; 胡兵兵; 袁小亚

氧化石墨烯包覆砂对水泥砂浆性能的影响

王迎豪¹,
郑城¹,
张逸舟¹,
苏俊儒¹,
张惠一²,
胡兵兵¹,
袁小亚^{1, 3, ,}

1.
重庆交通大学　材料科学与工程学院, 重庆 400074
2.
重庆交通大学　土木工程学院, 重庆 400074
3.
重庆诺奖二维材料研究院, 重庆 400714

基金项目: 国家自然科学基金项目(51402030)；重庆市技术创新与应用发展专项重点项目(CSTB2022TIAD-KPX0031)；重庆市级引导区县科技发展专项资金(JSYY2023010)；重庆市研究生导师团队建设项目(JDDSTD2022006)

详细信息

通讯作者:
袁小亚,博士,教授,硕士生导师,研究方向为纳米复合材料、建筑功能材料、高性能水泥混凝土　E-mail:yuanxy@cqjtu.edu.cn

中图分类号: TU528；TB33
计量
- 文章访问数: 52
- HTML全文浏览量: 18
- 被引次数: 0
出版历程
- 收稿日期: 2024-06-28
- 修回日期: 2024-08-01
- 录用日期: 2024-08-25
- 网络出版日期: 2024-09-04

Effect of graphene-oxide coated sand on the properties of cement mortar

1.
School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China
2.
School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China
3.
Chongqing 2 d Materials Institute of China, Chongqing 400714, China

Funds: National Natural Science Foundation of China (51402030); Chongqing Key Special Project for Technological Innovation and Application Development (CSTB2022TIAD-KPX0031); Chongqing Municipal Guided Special Fund for County and District Science and Technology Development (JSYY2023010); Chongqing Graduate Supervisor Team Construction Project (JDDSTD2022006)

摘要

摘要: 界面过渡区(ITZ)是水泥基材料中最为薄弱的部分，对水泥砂浆和混凝土的力学性能和耐久性有决定性的作用。本研究通过将氧化石墨烯(GO)附着在砂粒表面，探究GO包覆砂(GO@sand)对水泥砂浆性能的影响。结果表明，砂在GO悬浮液中搅拌12 h后，GO吸附量达到最大值0.093 mg/g；当GO掺量为0.024%时，可以显著改善水泥砂浆的力学性能和耐久性能，相比基准试件，3d抗压强度和抗折强度分别提高了31.12%、23.21%；28 d抗压强度和抗折强度也提高了11.76%、17.65%；砂浆抗渗压力提高了140%，抗硫酸盐侵蚀性能也有较大提升。通过对硬化后的水泥砂浆试块的XRD和SEM测试结果分析，表明吸附在砂表面的GO能加速ITZ区域的水泥水化进程、提高水化产物含量，增强ITZ的密实度，抑制微裂纹的扩展，从而增强水泥砂浆的力学性能和耐久性能。本文提供了一种GO@sand的方法来提升水泥砂浆的性能，凸显了GO@sand对ITZ纳米工程的有效性，可推广到其他水泥基材料。
- 氧化石墨烯 /
- 水泥砂浆 /
- 力学性能 /
- 耐久性 /
- 界面过渡区
Abstract: The interface transition zone (ITZ) is the weakest part in cement-based materials and plays a decisive role in the mechanical properties and durability of cement mortar and concrete. This study explored the impact of graphene oxide coated sand (GO@sand) on the performance of cement mortar by attaching graphene oxide to the surface of sand particles. The results indicate that after stirring the sand in a GO suspension for 12 hours, the amount of GO adsorbed by the sand reaches the maximum value of 0.093 mg/g; When the dosage of GO is 0.024%, it significantly improves the mechanical and durability properties of the cement mortar, Compared to the control specimens, the 3-day compressive strength and flexural strength increase by 31.12% and 23.21%, respectively; the 28-day compressive strength and flexural strength also increase by 11.76% and 17.65%, respectively; the mortar's resistance to permeation is enhanced by 140%, and the resistance to sulfate erosion also shows a significant improvement. The analysis of the XRD and SEM test results from the hardened cement mortar specimens indicates that the GO adsorbed on the surface of the sand has accelerated the hydration process in the ITZ, increased the content of hydration products, enhanced the compactness of the ITZ, and inhibited the propagation of micro-cracks, thereby enhancing the mechanical properties and durability of the cement mortar. This paper provides a method for enhancing the performance of cement mortar using GO@sand, highlighting the effectiveness of GO@sand in ITZ nano-engineering, and indicating that this approach can be extended to other cement-based materials.
- grapheme oxide /
- cement mortar /
- mechanical properties /
- durability /
- interface transition zone

HTML全文

图 1 GO@sand的制备过程

Figure 1. Preparation Process of GO@Sand

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图 2 吸附在砂表面的GO量随时间的变化曲线

Figure 2. Adsorption curve of GO on the sand

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图 3 标准砂的光学图片(a)、SEM图像(b)和EDS图谱(c)；10 h-GO@sand的光学图片(d)、SEM图像(e)和EDS图谱(f)

Figure 3. Optical images of standard sand (a), SEM images (b), and EDS spectra (c); Optical images of 10 h-GO@sand (d), SEM images (e), and EDS spectra (f)

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图 4 标准砂和10 h-GO@sand的FTIR图谱

Figure 4. FTIR spectra of standard sand and 10 h-GO@sand

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图 5 标准砂和10 h-GO@sand的Raman图谱

Figure 5. Raman plots of standard sand and 10 h-GO@sand

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图 6 GO@sand浸入去离子水(左)和水泥孔隙溶液(右)的照片：(a)摇晃前；(b)摇晃后

Figure 6. Photographs of GO@sand immersed in deionised water (left) and cement pore solution (right): (a) Before shaking; (b) After shaking

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图 7 包覆在砂表面的GO对水泥砂浆的流动度的影响

Figure 7. Effect of GO coated on the sand on the fluidity of cement motars

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图 8 不同GO掺量的GO@sand改性水泥砂浆试件的抗压强度(a)和抗折强度(b)耐蚀系数

Figure 8. Compressive strength (a) and flexural strength (b) corrosion resistance coefficients of GO@sand modified cement mortar specimens with different GO dosages

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图 9 不同GO掺量的 GO@sand改性水泥砂浆的抗渗压力和抗渗压力比

Figure 9. Seepage pressure and seepage pressure ratio of GO@sand modified cement mortar with different GO dosages

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图 10 砂浆样品Z1((a)、(b))和Z3((c)、(d))的SEM图像

Figure 10. SEM images of mortar samples Z1 ((a), (b)) and Z3 ((c), (d))

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图 11 不同GO掺量的GO@sand改性水泥砂浆养护28 d后的XRD图谱

Figure 11. XRD patterns of GO@sand-modified cement mortars with different GO dosages after 28 d curing

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表 1 水泥的物理性能

Table 1. Physical properties of cement

Stability/mm	Fineness/%	Density/(g·mm⁻³)	Specific Surface Area/(m²·kg⁻¹)	Standard Consistency/%	Coagulation Time /min
Stability/mm	Fineness/%	Density/(g·mm⁻³)	Specific Surface Area/(m²·kg⁻¹)	Standard Consistency/%	Initial coagulation	Final coagulation
0.50	0.60	3.15	350	25.60	132	198

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表 2 水泥化学成分

Table 2. Chemical composition of cement

Mineral	Al₂O₃	SiO₂	Fe₂O₃	CaO	MgO	SO₃	NaO	f-CaO	C₃S	C₂S	C₃A	C₄AF
Content/wt%	4.47	21.5	3.37	65.84	3.18	0.3	0.49	0.78	58.92	20.19	8.12	8.21
Note: f-CaO−Free calcium oxide.

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表 3 GO@sand改性水泥砂浆配合比

Table 3. Mix ratio of GO@sand modified cement mortar

Sample^①	Cement/g	PCE/g	Water/g	Sand/g	GO^②/%
Z₁(0 h-GO@sand)	450	1.5	171	1350 g	0
Z₂(5 h-GO@sand)	450	1.5	171	1350 g	0.015
Z₃(10 h-GO@sand)	450	1.5	171	1350 g	0.024
Z₄(15 h-GO@sand)	450	1.5	171	1350 g	0.028
Notes: ①—Cement mortar specimens prepared by substituting standard sand with xh-GO@sand(stirred for x hours of GO@sand); ②—Dosage of GO was calculated as the weight percentage of the cement.

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表 4 GO@sand对水泥砂浆抗折抗压强度影响

Table 4. Effect of GO@sand on flexural and compressive strength of cement mortar

Sample	Flexural strength (MPa)/growth rate (%)		Compressive strength (MPa)/growth rate (%)
Sample	3 d	28 d	3 d	28 d
Z₁	5.6/0	6.8/0	34.7/0	42.5/0
Z₂	6.7/19.64	7.8/14.71	41.7/20.21	43.7/2.82
Z₃	6.9/23.21	8/17.65	45.5/31.12	47.5/11.76
Z₄	6.6/17.86	7.3/7.35	45.4/30.84	46.2/8.71

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表 5 GO改性砂浆28 d抗压抗折强度的文献比较分析

Table 5. Comparative literature analysis of 28 d compressive and flexural strength of GO modified mortar

Ref.	GO/%	Change rate of compressive strength/%	Change rate of flexural strength/%
Ref.	GO/%	28 d
This word	0.024	11.76	17.65
[14]	0.03	3.2	19.4
[34]	0.06	14.04	9.2
[35]	0.05	18	17
[36]	0.04	7.15	4.69
[37]	0.08	13.6	11.61
[38]	0.04	3.33	/

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