采用宁夏青铜峡天8NlFAxmGqVrHpl0CjvIZJaB3hrMmf0aav3cNHYGNHPk=然砂,根据《建设用砂》(GB/T 14684-2001)试验确定出,细度模数2.778qoguTQyCEyd2F+JSACvuyY/wFRjN/k1ey2d+RzznD4=(中砂),含泥量1.9%,松散堆积密(试读)...