Rice hull ash can also have benefits to concrete. Its been around for decades. https://theconstructor.org/concrete/rice-husk-ash-concrete-construction/15725/ h

Rice hull ash can also have benefits to concrete. Its been around for decades. https://theconstructor.org/concrete/rice-husk-ash-concrete-construction/15725/ https://theconstructor.org/concrete/rice-husk-ash-concrete-c...