STUDY OF THE EFFECT OF CALCIUM LIGNOSULPHONATE AS A SECONDARY ADDITIVE ON THE STRENGTH CHARACTERISTICS OF SOIL- BITUMEN MIXTURES-TURKEY

A LABORATORY INVESTIGATION WAS CONDUCTED TO DETERMINE THE EFFECT OF THE ADDITION OF, RESPECTIVELY SULPHITE LIQUOR AND SULPHITE LIQUOR PLUS BITUMEN ON THE STRENGTH CHARACTERISTICS OF TWO DIFFERENT TYPES OF SOILS. ONE OF THEM WAS A NON- PLASTIC SANDY SOIL AND THE OTHER WAS A PLASTIC SOIL WITH A PLASTICITY INDEX OF 12. THE ASPHALTIC MATERIAL USED WAS CRUDE OIL WHOSE VISCOSITY WAS LOWERED BY ADDING KEROSENE. THE OBJECTIVE OF THE STUDY WAS TO IMPROVE THE STRENGTH CHARACTERISTICS OF BITUMEN STABILIZED SOILS BY BINDING THE SOIL PARTICLES TOGETHER WITH SULPHITE LIQUOR FIRST, AND BY ADDING THE BITUMEN AFTERWARDS. ALTHOUGH SULPHITE LIQUOR DOES NOT WATERPROOF A SOIL (ACTS AS A BONDING AGENT ONLY), A SOIL THAT HAS BEEN PROPERLY BONDED TOGETHER WILL ABSORB LESS MOISTURE THAN THE UNTREATED SOIL. THE CHIEF DIFFICULTY IN THE BITUMINOUS STABILIZATION OF A SOIL IS A TENDENCY OF BITUMINOUS FILM TO BE DISPLACED BY THE ACTION OF WATER FROM THE SURFACE OF THE SOIL PARTICLES. THIS DIFFICULTY IS OVERCOME BY THE USE OF ANTI-STRIPPING AGENTS, THESE ADHESION AGENTS BEING GENERALLY SURFACE ACTIVE MATERIALS WHICH ARE ABSORBED AT THE SOIL-BINDER INTERFACE. IT IS CONCLUDED THAT WHEN SULPHITE LIQUOR WAS USED AN INCREASE IN STRENGTH WAS NOTED BOTH FOR NON-PLASTIC AND PLASTIC SOILS, IN COMPARISON WITH THE SPECIMENS OF THOSE PREPARED WITH WATER ONLY. A FURTHER INCREASE IN STRENGTH WAS NOTED FOR NON-PLASTIC SOIL USING SULPHITE LIQUOR IN COMBINATION WITH CRUDE OIL. THIS COMBINATION PRODUCED A DECREASE IN STRENGTH FOR PLASTIC SOIL. WHEN CRUDE OIL ALONE WAS USED, VERY MUCH SMALLER VALUES FOR STRENGTH WERE OBTAINED IN COMPARISON WITH THE OTHER ADDITIVES. A DECREASE IN STRENGTH WAS NOTED FOR BOTH NON-PLASTIC AND PLASTIC SOILS WHEN WATER WAS ADDED TO SOIL AS A TRACER FOR CRUDE OIL. SINCE CALCIUM LIGNOSULPHONATE IS A WATER SOLUBLE COMPOUND, IT WAS NECESSARY TO USE IT IN COMBINATION WITH CRUDE OIL TO PROVIDE ENOUGH RESISTANCE TO WATER. IN ALL CASES, THE SUM OF THE LIQUID CONTENTS WERE TAKEN EQUAL TO THE OPTIMUM MOISTURE CONTENT OF THE SOILS.

  • Supplemental Notes:
    • No Iii-23, PP 4-6
  • Authors:
    • Yagiz, F
    • Isiksalan, C
    • Akkol, G
  • Publication Date: 0

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  • Accession Number: 00231258
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 15 2004 2:41AM