水泥凝结28天达到设计抗压强度的检测数据

所有建筑工程都必须以水泥作为原材料，所以水泥在整个建筑工程中发挥的重要性质毋庸置疑，检测凝结28天的水泥是否达到设计抗压强度是为了加强整体建筑水平，提高检测人员对水泥检测这项工作的重视。按照国家标准GB175-2007进行检测操作，记录加水搅拌的具体时间，以及水泥初凝和终凝的所需时长。按照标准方法设计水泥强度等级为42.5，制作和标准养护的边长为100mm的立方体试件，在28天龄期用标准试验方法利用压力试验机测得水泥抗压强度。水泥强度设计等级为42.5时，取三个试件通过仪器测出破坏荷载，测得的强度值均应乘以尺寸换算系数，对100mmX100mm试件可取为0.95，从而计算出三个试件的抗压强度，平均值作为组试件抗压强度代表值，公式如下：达到设计强度(%)=【（破坏荷载1*换算系数0.95）/受压面积+（破坏荷载2*换算系数0.95）/受压面积+（破坏荷载3*换算系数）/受压面积】/3。最后得出的数值大于等于设计强度42.5则为达到设计强度。

Cement is a mandatory raw material for all construction projects, so its critical role in the entire construction process is unquestionable. Detecting whether 28-day cured cement meets the designed compressive strength aims to improve the overall construction quality and enhance the attention of testing personnel to cement testing work. Testing operations shall be conducted in accordance with the national standard GB175-2007. The specific time of water mixing and stirring and the durations required for initial and final setting of cement shall be recorded. Cement with a strength grade of 42.5 is prepared via standard methods, and cubic specimens with a side length of 100 mm are fabricated and standard-cured. At the age of 28 days, the compressive strength of the cement specimens is measured using a pressure testing machine in accordance with standard test methods. For cement with a designed strength grade of 42.5, the failure loads of three specimens are measured by the testing apparatus. All measured strength values shall be multiplied by the size conversion factor, which is 0.95 for 100mm×100mm specimens. The compressive strengths of the three specimens are calculated, and their average value is taken as the representative compressive strength of the test group. The formula is as follows: Percentage of reaching designed strength (%) = [(Failure Load 1 × 0.95)/Compression Area + (Failure Load 2 × 0.95)/Compression Area + (Failure Load 3 × Conversion Factor)/Compression Area]/3. If the final calculated value is greater than or equal to 42.5, the cement meets the designed strength requirement.

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该数据集包含84条记录，记录了水泥在28天龄期时的抗压强度检测数据，涵盖了从搅拌加水时间到抗压强度的多个关键指标。数据按照国家标准GB175-2007进行检测，确保数据的准确性和可靠性，主要用于建筑工程中水泥质量的检测和评估。