A novel green approach for making hybrid inorganic- organic geopolymeric cementitious material utilizing fly ash and rice husk

•Novel process for preparation of hybrid inorganic −organic geopolymeric material.•In −situ synthesis of sodium silicate thus obviating its need.•Transformation of tetra coordinated silicon complexes in fly ash and rice husk to.•Penta coordinated silicon complexes in hybrid inorganic −organic geopolymeric material.