The main sand and gravel system parent rock is limestone in four material yards: Xinyan, Huajie, Machangping, and Xinjie; There are five material yards with dolomite as the parent rock: 771, Xiangyuan, Madaobian, Lubi, and Wujiayuan.
The experiment mainly conducted a relationship test between methylene blue and mud content in six sand and gravel production sites, established a formula for the relationship between methylene blue and mud content, calculated the mud content of the sand from it, and calculated the cost of water reducer per cubic meter of concrete based on the different dosage of water reducer used for different mud contents.
In addition, a comparative experiment was conducted on the water reducing agent dosage between the medium stone backfilled sand (medium stone backfilled sand with relatively low mud content) and ordinary machine-made sand (produced from ordinary raw materials) in the Ma Dao Border Material Yard; Conduct comparative tests on the addition of water reducing agents and compressive strength results of different methylene blue sands in the new rock material yard using the same concrete mix ratio.
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