| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide concrete which has a higher degree of white color and is excellent in design property while retaining properties of the conventional ultrahigh-strength concrete in the aspects of fluidity, strength, endurance, etc. <P>SOLUTION: The white color ultrahigh-strength concrete is made of a hardened body of a compounded material including: cement (hereinafter described as low-heat white color cement) in which the content of alite quantified by Rietveld analysis using powder X-ray diffraction is 20.0 to 40.0 mass%, the content of belite is 40.0 to 70.0 mass%, the content of aluminate phase is 4.0 mass% or less and the content of ferrite phase is 1.5 mass% or less; fine powder having a BET specific surface of 3 to 20 m<SP>2</SP>/g, lime powder having a Blaine specific surface of 4,000 to 10,000 cm<SP>2</SP>/g and aggregate particles having the percentage of passage through 1.5 mm sieve of 90 wt.%; water; and a water-reducing agent, and the L-value of a mixture of the low-heat white color cement, fine powder and lime powder is at least 75. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
