Cementitious composition
A cementitious composition, including for the molding of relatively light-weight, heat-insulative, nailable, structural units such as bricks, blocks, roof decking, etc. The composition may include an inorganic cementitious settable admixture within which is incorporated a significant proportion of waste industrial products, such as concrete, blacktop, windmill blades, brick chips, plastics, cordierite, tires, stack dust and/or fly ash, ceramics, clays, metals and plastics. The waste industrial products may be incorporated into the composition in various proportions.
1 . A cementitious composition, comprising:
9-30 weight percent (wt %) of cement, wherein the wt % is defined relative to a total dry weight of the cementitious composition, the total dry weight being a weight of the cementitious composition prior to adding water;
1-55 wt % of at least one of fly ash and bottom ash;
14-60 wt % of sand;
1.9-4.5 wt % of slag; and
0.5-6 wt % of plastic.
2 . The cementitious composition of claim 1 , wherein the plastic is about 1.5 wt %, and
wherein the cementitious composition further comprises polyethylene separate from the plastic having a wt % of about 0.1.
3 . The cementitious composition of claim 2 , further comprising about 2 wt % of glass, and
wherein the fly ash or bottom ash is about 15 wt %.
4 . The cementitious composition of claim 1 , further comprising about 4 wt % of tire chips or 5-8 wt % of asphalt millings.
5 . The cementitious composition of claim 1 , further comprising:
16-30 wt % of stone or crushed brick.
6 . The cementitious composition of claim 1 , further comprising:
about 1 wt % of cordierite, and
wherein the slag is about 2 wt %.
7 . The cementitious composition of claim 6 , wherein the cement is about 18 wt %, and
wherein the fly ash or bottom ash is about 3 wt %.
8 . The cementitious composition of claim 7 , wherein the plastic is about 4 wt %, and
wherein the sand is about 42 wt %.
9 . The cementitious composition of claim 1 , further comprising about 18 wt % of stone, and
wherein the plastic is about 3.7 wt %.
10 . The cementitious composition of claim 1 , further comprising 1-5 wt % of silica fume, and
wherein the plastic is about 2-5 wt %.
11 . The cementitious composition of claim 1 , further comprising about 8 wt % of asphalt millings, and
wherein the fly ash is about 4 wt %.
12 . The cementitious composition of claim 1 , further comprising about 8 wt % of quarry dust powder, and
wherein the fly ash is about 4 wt % relative to the total dry weight.
13 . The cementitious composition of claim 1 , further comprising:
about 8 wt % of quarry dust powder, and
about 8 wt % of asphalt millings, and
wherein the fly ash is about 4 wt %.
14 . The cementitious composition of claim 13 , further comprising about 16 wt % of stone.
15 . The cementitious composition of claim 14 , wherein the plastic is about 4 wt %,
wherein the cementitious composition further comprises about 0.1 wt % of polyethylene separate from the plastic, and
wherein the sand is about 43 wt %.
16 . The cementitious composition of claim 15 , further comprising about 4 wt % of slag, and
wherein the fly ash is about 4 wt %.
17 . A cementitious composition, comprising:
10-25 weight percent (wt %) of cement, wherein the wt % is defined relative to a total dry weight of the cementitious composition, the total dry weight being a weight of the cementitious composition prior to adding water;
3-15 wt % of at least one of fly ash and bottom ash;
40-60 wt % of sand;
1.9-4.5 wt % of slag; and
1.5-5 wt % of plastic.
18 . The cementitious composition of claim 17 , further comprising about 2 wt % of glass,
wherein the cementitious composition further comprises about 0.1 wt % of polyethylene separate from the plastic,
wherein the fly ash or bottom ash is about 15 wt %, and
wherein the cement is about 25 wt %.
19 . The cementitious composition of claim 17 , further comprising about 1 wt % of cordierite,
wherein the fly ash or bottom ash is about 3 wt %, and
wherein the cement is about 19 wt %.
20 . The cementitious composition of claim 17 , further comprising:
about 8 wt % of quarry dust powder;
about 8 wt % of asphalt millings; and
wherein the plastic is about 4 wt %,
wherein the fly ash is about 4 wt %, and
wherein the cement is about 10 wt %.