衬砌结构受到上覆土和岩层传递的三维应力，通常会受到外部硫酸盐侵蚀；水泥材料的渗透性和力学性能对地下工程的稳定性具有重要意义，实验结果可为建立高硫酸盐环境下混凝土结构的长期稳定性提供参考材料。\n
该数据集采用岩土试验方法，分析了硫酸盐侵蚀水泥砂浆试件的透气性、超声P波速度、单轴压缩和劈裂抗拉强度的变化规律。（1）随着围压的增加，气体渗透率逐渐下降，受侵蚀试样和未受侵蚀试样的气体渗透率和下降幅度不同。（2）受攻击试件的气体渗透率较大，对围压在5～20MPa范围内的变化更为敏感；在20～30MPa的高围压下，气体渗透率的下降速度降低。（3）受攻击试样的超声P波速度明显低于未受攻击试样，而其开孔率则高于其对应试样。（4）硫酸盐侵蚀后劈裂抗拉强度和单轴抗压强度均下降，且前者劣化更为严重。", "ds_source": "
数据来源于试验测量。", "ds_process_way": "
采用岩土试验方法，分析了硫酸盐侵蚀水泥砂浆试件的透气性、超声P波速度、单轴压缩和劈裂抗拉强度的变化规律。", "ds_quality": "
数据质量良好。", "ds_acq_start_time": "2019-12-01 00:00:00", "ds_acq_end_time": "2019-12-31 00:00:00", "ds_acq_place": "湖北武汉", "ds_acq_lon_east": null, "ds_acq_lat_south": null, "ds_acq_lon_west": null, "ds_acq_lat_north": null, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "apply-access", "ds_total_size": 27249, "ds_files_count": 3, "ds_format": "excel", "ds_space_res": null, "ds_time_res": "", "ds_coordinate": "无", "ds_projection": "", "ds_thumbnail": "e377b477-d6f5-4bed-9190-15c181379487.jpg", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "为保障平台科技资源的权益、扩展平台中心的服务、提升科技资源的应用潜力，请资源使用者在使用资源所产生的研究成果中（包括公开发表的论文、论著、数据产品和未公开发表的研究报告、数据产品等成果），明确注明资源来源和资源作者。", "ds_from_station": null, "organization_id": "57a5e5a3-6fc5-43b5-a2ba-1f2ca54b7727", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": [ "170.50" ], "quality_level": 3, "publish_time": "2023-04-28 17:54:01", "last_updated": "2023-07-07 02:10:02", "protected": false, "protected_to": "2025-01-01 00:00:00", "lang": "zh", "cstr": "11738.11.NCDC.NIEER.DB2808.2023", "i18n": { "en": { "title": "Data set of gas permeability change under different confining pressures", "ds_format": "", "ds_source": "
<pre><code> <p>&emsp;&emsp; The data comes from the test measurement.\n <pre><code> <p>&emsp;&emsp; The data quality is good.\n <pre><code> <p>&emsp;&emsp; The lining structure is subject to the three-dimensional stress transmitted by the overlying soil and rock stratum, and is usually subject to external sulfate erosion; The permeability and mechanical properties of cement materials are of great significance to the stability of underground works. The experimental results can provide reference materials for establishing the long-term stability of concrete structures in high sulfate environment.\nThe data set adopts the geotechnical test method to analyze the changes of permeability, ultrasonic P-wave velocity, uniaxial compression and splitting tensile strength of sulfate eroded cement mortar specimens. (1) With the increase of the confining pressure, the gas permeability decreases gradually, and the gas permeability and decreasing amplitude of the corroded sample and the non corroded sample are different. (2) The gas permeability of the attacked specimen is large, and it is more sensitive to the change of confining pressure in the range of 5~20MPa; Under the high confining pressure of 20~30MPa, the decreasing rate of gas permeability decreases. (3) The ultrasonic P-wave velocity of the attacked sample is obviously lower than that of the non attacked sample, while its open porosity is higher than its corresponding sample. (4) The splitting tensile strength and uniaxial compressive strength decreased after sulfate attack, and the former deteriorated more seriously.
", "ds_time_res": "", "ds_acq_place": "Wuhan, Hubei", "ds_space_res": "", "ds_projection": "", "ds_process_way": " <pre><code> <p>&emsp;&emsp; The variation of permeability, ultrasonic P-wave velocity, uniaxial compression and splitting tensile strength of sulfate eroded cement mortar specimens were analyzed by geotechnical test method.\n