求翻译：当水泥用量为20%时，可满足泡沫混凝土试块1d拆模强度要求，当脱硫石膏与粉煤灰用量比例为2:8时，混凝土具有相对较高的早期抗压强度和较低的容重。是什么意思？

When the amount of cement to 20%, which can meet the strength of the foam concrete block 1d form removal requirements, when the amount of FGD gypsum and fly ash ratio of 2:8, concrete has a relatively high early compressive strength and low bulk density .

When cement usage is 20 per cent, you can try for foam concrete block 1D split the strength requirements, desulphurization plaster and pulverized fuel ash usage ratio of 2:8, when concrete is relatively high compared with the early compressive strength and of interral low.

When the cement content is 20%, may satisfy the foam concrete briquette 1d form removal intensity request, when the desulphurization gypsum and the pulverized coal ash amount used proportion is 2:8, the concrete has the relative high early compressive strength and the low bulk specific gravity.

When 20% is cement dosage, to meet the test of foam concrete blocks 1d mold-breaking strength requirements, when the flue gas desulphurization gypsum and fly ash consumption ratio is 2:8, early concrete has relatively high compressive strength and low density.

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