The invention discloses a water permeable
brick and a preparation method thereof. The water permeable
brick comprises two parts, namely a
surface layer and a base layer, wherein the material of the
surface layer is prepared from the following components in percentage by
mass: 60-70% of
ceramic sand, 15-20% of sand and 15-20% of
cement, and in addition to the
solid components with the sum of 100% in percentage by
mass, water accounting for 50-60% by
mass of
cement is further added; and the material of the base layer is prepared from the following components in percentage by mass: 45-65% of building
silt unburned ceramsite, 10-15% of
cement, 5-10% of
fly ash, 10-15% of
melon seed-shaped
drug slices and 10-15% of sand, and in addition to the
solid components with the sum of 100% in percentage by mass, the water accounting for 30-40% and a
water reducer accounting for 1-1.5% relative to total mass of the cement and the
fly ash are further added. The water permeable
brick disclosed by the invention is prepared by using the building
silt unburned ceramsite to replace natural aggregate or calcined ceramsite, on one hand, the using ways of the building
silt unburned ceramsite can be expanded, the
utilization rate of
solid wastes is improved, and negative effects on an environment are reduced, and on the other hand, the obtained water permeable brick has excellent performance.