Unclassified 



SECURITY CLASS!FICATION OF TH 



Block 20. Continued 



with mixtures of creosote containing tributyltin oxide at levels of 100 to 250 ml per liter 

 remained free of fouling for 4 years. The antifouling concrete is not quite as strong as 

 concrete made with sand and gravel, but it is strong enough for construction in which a 

 compressive strength of 3,500 psi is acceptable. 



Library Card 



Civil Engineering Laboratory 



ANTIFOULING MARINE CONCRETE (Final),by James S. Muraoka 



and Harold P. Vind 



TN-1392 22p.illus May 1975 Unclassified 



1. Degradation 2. Materials I. YF54. 593.007.01.001 



A method was developed for incorporating mixtures of creosote and other toxic 

 chemicals into concrete by first impregnating a porous expanded shale aggregate with the toxic 

 mixture. The impregnated aggregate was then mixed with portland cement and water to produce 

 an antifouling marine concrete. Concrete panels made from aggregates impregnated with mixtures 

 of creosote containing tributyltin oxide at levels of 100 to 250 ml per liter remained free of 

 fouling for 4 years. The antifouling concrete is not quite as strong as concrete made with sand 

 and gravel, but it is strong enough for construction in which a compressive strength of 3,500 psi 

 is acceptable. 



Unclassified 



ASSIFICATION OF THIS PA 



