UC知道急 找高人帮翻译
来源：百度知道 编辑：UC知道 时间：2024/05/19 15:49:55
1.4.2 testing for consistency of the mix
The consistency of fresh concrete is determined with the slump test which utilizes a standard
Metal cone shown in figure 1-7. the cone is filled with the sample in three approximately equal
Layers being tamped 25 times with a inch diameter by 24 inches long steel rod off as the sample subsides downwards. The empty cone is now placed alongside the sample and the amount of slump measured to the nearest 1/4 inch. The test must be started within five minutes of taking the sample and be completed in 2 minutes ,as the consistency is affected by delay.
Figure 1-7 standard slump cone figure 1-8 splitting cylinder test
1.43 testing of the concrete
Compressive strength of the concrete is determined from 6 inches diameter by 12inches high test specimens. the fresh concrete is placed in the mould within 15 minutes of sampling and compacted by either tamping or vibration. The top surface is
The consistency of fresh concrete is determined with the slump test which utilizes a standard
Metal cone shown in figure 1-7. the cone is filled with the sample in three approximately equal
Layers being tamped 25 times with a inch diameter by 24 inches long steel rod off as the sample subsides downwards. The empty cone is now placed alongside the sample and the amount of slump measured to the nearest 1/4 inch. The test must be started within five minutes of taking the sample and be completed in 2 minutes ,as the consistency is affected by delay.
Figure 1-7 standard slump cone figure 1-8 splitting cylinder test
1.43 testing of the concrete
Compressive strength of the concrete is determined from 6 inches diameter by 12inches high test specimens. the fresh concrete is placed in the mould within 15 minutes of sampling and compacted by either tamping or vibration. The top surface is
1.4.2测试一致性的组合的一致性拌混凝土的决心与坍whichutilizes 标准金属锥列于图1-7. 锥充满样品在三个约等于被层层夯实25倍,与直径 24英寸长的钢丝冒充样本subsides向下. 空锥正放在旁边的样品和量测大跌到就近1/4英寸. 测试必须开始后5分钟内采取样品,并于2分钟,由于 一致性,是受延误. 图1-7标准slumpcone图1-8裂缸试验1.43检验混凝土抗压强度的混凝土 决定从6英寸口径的12inches高试. 混凝土拌合是放置在模在15分钟的采样和压缩由夯或震动. 顶面troweled顺利. 盖上塑料帽,并治愈的情况下,控制温度和湿度,为期28天. 在另一端的分销商,然后顶着硫化合物和装载机在恒定速度, 在压缩测试机,是要失败的. 必要时,试样硬化混凝土可能采取的形式完成的结构,减cores. 汽缸获得必须有一个直径不得少于三次最大规模的骨料, 且长度大约相当于直径. 对于长度较短,校正因子必须实施的结果. 施密特的回弹,可作为一种非破坏性检测方法原位混凝土强度. 测量反弹的弹簧柱塞标明了硬度的混凝土表面和 关联反弹抗压强度和可能确定258. 1.5混凝土性能1.51抗压强度的混凝土抗压强度主要取决于水灰比,年龄和固化条件. 影响水灰比抗压强度是列于图1-3. 不同年龄的混凝土强度发展是列于图1-1. 设计实力,通常基于缸体强度为28天. 1.52抗拉强度直接混凝土抗拉强度是由手段分裂缸试验. 这包括加载一个标准的6英寸缸径laterally,如图1-8,直至它分裂. 值的抗拉强度所得用于设计轻质混凝土. 裂强度是由