White cementitious compositions

1. A cementitious composition comprising a dry blend of:

white Portland cement having a Blaine fineness between about 350 m 2 /kg and about 550 m 2 /kg, a D90 between about 11 μm and about 50 μm, and a total combined iron oxide, manganese oxide, and chromium oxide content of less than 1.0% by weight;

at least one pozzolan selected from white silica fume, metakaolin, ground pumice, and ground volcanic ash and having a Blaine fineness greater than the Blaine fineness of the white Portland cement, a D90 less than the D90 of the white Portland cement, and a total combined iron oxide, manganese oxide, and chromium oxide content of less than 3.0% by weight; and

at least one particulate material selected from ground granulated blast furnace slag (GGBFS), Class C fly ash, ground limestone powder, and ground marble.

2. The cementitious composition of claim 1 , wherein the Blaine fineness of the white Portland cement is between about 400 m 2 /kg and about 550 m 2 /kg.

3. The cementitious composition of claim 1 , wherein the D90 of the white Portland cement is between about 12 μm and about 45 μm, and wherein the white Portland cement has a D10 greater than 1.0 μm.

4. The cementitious composition of claim 1 , wherein the Blaine fineness of the light color pozzolan is between about 550 m 2 /kg and about 30,000 m 2 /kg.

5. The cementitious composition of claim 1 , wherein the white Portland cement has a total combined transition metal oxide content of less than 1.0% by weight.

6. The cementitious composition of claim 1 , wherein the pozzolan has a total combined transition metal oxide content of less than 3.0% by weight.

7. The cementitious composition of claim 1 , wherein the white Portland cement comprises between about 20% and about 80% by combined weight of the white Portland cement, the pozzolan, and the particulate material.

8. The cementitious composition of claim 1 , wherein the white Portland cement has a reflectance value of at least 75%.

9. The blended cement composition of claim 1 , wherein the light color pozzolan has a reflectance value of at least 70%.

10. The cementitious composition of claim 1 , wherein the at least one particulate material has a total combined transition metal oxide content of less than 3.0% by weight.

11. The cementitious composition of claim 1 , further comprising at least one additive selected from lime (CaO), dolomite lime (CaO.MgO), hydrated lime (Ca(OH) 2 ), hydrated dolomite lime (Ca(OH) 2 .Mg(OH) 2 ), calcium sulfate hemihydrate, anhydrous calcium sulfate, calcium sulfate dihydrate, or lithium sulfate.

12. The cementitious composition of claim 1 , further comprising at least one aggregate selected from fine sand, medium sand, coarse sand, pea gravel, coarse aggregate, and blends thereof.

13. The cementitious composition of claim 12 , wherein the at least one aggregate is selected from limestone, marble, dolomite, marble, quartz, quartzite, pumice, polymers, and blends thereof.

14. The cementitious composition of claim 1 , further comprising fibers selected from glass fibers, polypropylene fibers, polyvinyl alcohol fibers, nylon fibers, or blend thereof.

15. A cementitious mixture comprising mixture products of:

water;

white Portland cement having a Blaine fineness between about 350 m 2 /kg and about 550 m 2 /kg, a D90 between about 11 μm and about 50 μm, and a total combined iron oxide, manganese oxide, and chromium oxide content of less than 1.0% by weight;

at least one pozzolan selected from white silica fume, metakaolin, ground pumice, and ground volcanic ash and having a Blaine fineness greater than the Blaine fineness of the white Portland cement, a D90 less than the D90 of the white Portland cement, and a total combined iron oxide, manganese oxide, and chromium oxide content of less than 3.0% by weight; and

at least one particulate material selected from ground granulated blast furnace slag (GGBFS), Class C fly ash, ground limestone powder, and ground marble.

16. The cementitious mixture of claim 15 , wherein the cementitious composition is selected from precast concrete, stucco, glass fiber reinforced concrete (GFRC), ultra-high performance concrete (UHPC), or self-consolidating concrete (SCC).

17. A hardened cementitious composition comprising reaction products of the cementitious mixture of claim 15 .

18. A method of manufacturing a cementitious composition comprising:

providing white Portland cement prepared by grinding white cement clinker in a mill together with gypsum to produce the white Portland cement having a Blaine fineness between about 350 m 2 /kg and about 550 m 2 /kg, a D90 between about 11 μm and about 50 μm, and a total combined iron oxide, manganese oxide, and chromium oxide content of less than 1.0% by weight;

providing at least one pozzolan selected from white silica fume, metakaoline, ground pumice, and ground volcanic ash and having a Blaine fineness greater than the Blaine fineness of the white Portland cement, a D90 less than the D90 of the white Portland cement, and a total combined iron oxide, manganese oxide, and chromium oxide content of less than 3.0% by weight;

providing at least one particulate material selected from ground granulated blast furnace slag (GGBFS), Class C fly ash, ground limestone powder, and ground marble; and

blending the white Portland cement, the at least one light color pozzolan, and the at least one particulate material.

19. The method of claim 18 , wherein the cementitious composition is a dry preblend.

20. The method of claim 18 , further comprising blending water with the cementitious composition to form a freshly mixed composition.