举例说明了含有轻骨料的结构级混凝土的配比和调整比例的方法。重量（比重瓶）法使用由骨料置换比重瓶试验确定的比重系数（方法1）。重量法还使用比重系数来估算每码新拌水泥的重量。samp松体积法使用水泥含量-强度关系设计所有轻质混凝土和砂轻质混凝土（方法2）。举例说明了批量重量、有效置换体积的系统计算，以及补偿骨料含水量、骨料比例、水泥含量、坍落度或含气量变化的调整。

Describes, with examples, methods for proportioning and adjusting proportions of structural grade concrete containing lightweight aggregates. The weight (pycnometer) method uses a specific gravity factor determined by a displacement pycnometer test on the aggregates (Method 1). The weight method also employs the specific gravity factor to estimate the weight per yard of the fresh cement. The samp, loose volume method uses the cement content-strength relationship for the design of all lightweight and sand lightweight concretes (Method 2). Examples are given for systematic calculation of batch weights, effective displaced volumes, and adjustments to compensate for changes either in aggregate moisture content, aggregate proportions, cement content, slump or air content.