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Celem badań przedstawionych w pracy była ocena możliwości zastosowania preparatów hydrofobowych na bazie związków krzemoorganicznych do zabezpieczania betonu lekkiego modyfikowanego trocinami. Część doświadczalna pracy dotyczy właściwości fizycznych i mechanicznych betonu lekkiego oraz wpływu dwóch preparatów hydrofobowych na kąt zwilżania materiału. Określono kąt zwilżania betonu lekkiego (θw) w funkcji czasu za pomocą jednej cieczy pomiarowej. Za pomocą mikroskopu elektronowego pokazano powłoki hydrofobowe w strukturze betonu lekkiego, w którym zastosowano trociny jako kruszywo grube (CASD). Na podstawie badań określono skuteczność hydrofobizacji porowatych betonów lekkich. Dla powierzchni hydrofobowej zmniejszył się kąt zwilżania i był on zależny od zastosowanych środków. Najniższy kąt zwilżania 40,2° (t=0) uzyskano dla betonu wzorcowego przed hydrofobizacją i 112,2° po hydrofobizacji żywicą metylo-silikonową na bazie rozpuszczalnika organicznego. Wyniki badań naukowych potwierdzają możliwość otrzymywania betonów lekkich modyfikowanych za pomocą CASD z odpowiednią ochroną powierzchni przed działaniem wilgoci z zewnątrz.
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