Methods of making a porous concrete structure
阅读：775发布：2022-10-02
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1. A METHOD OF MANUFACTURE OF A LARGE POROUS CONCRETE STRUCTURE COMPRISING FORMING SPHERICAL BEADS OF UNIFORM SIZE OF BETWEEN 0.1 AND 8 MM. DIAMETER CONSISTING ESSENTIALLY OF A HARDENED AQUEOUS GEL CONTAINING AIR AND WATER BY DROPPING GLOBULES OF AQUEOUS GEL INTO A HARDENING MEDIUM AFTER PASSAGE THROUGH A PREHARDENING MEDIUM IN WHICH THE GLOBULES ASSUME A SPHERICAL SHAPE AND UNDERGO PRELIMINARY HARDENING OF THE GEL SURFACE, THE GEL SURFACE UNDERGOING FURTHER AND THOROUGH HARDENING IN THE HARDENING MEDIUM, HOMOGENEOUSLY ADMIXING SAID BEADS TOGETHER WITH A PORE-FORMING AGENT SELECTED FROM THE GROUP CONSISTING OF GAS-EVOLVING AGENTS AND FOAMING AGENTS INTO A FLUID CONCRETE MASS AND PERMITTING SAID CONCRETE MASS TO SET IN SITU WITH THE BEADS UNIFORMLY DISTRIBUTED IN SAID MASS, SAID AQUEOUS GEL BEADS UNDERGOING EVAPORATION AFTER SETTING OF THE MASS TO PRODUCE A STRUCTURE COMPRISING LARGER PORES FORMED BY THE EVAPORATED SHPERICAL BEADS AND SMALLER PORES FORMED BY SAID POREFORMING AGENT.
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