Hemp straw ash as a supplementary cementitious material
AssigneeNextleaf Solutions Ltd.
InventorsSudip Talukdar, Spencer Behn, Kumayl Aarifali Rashid, Farhad Pargar, Cristina Zanotti
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Abstract
Hemp straw is ground and burnt to result in hemp straw ash for making concrete. The hemp straw ash is mixed with water, cement, fine aggregate, coarse aggregate and superplasticizer using a two-step addition process to form a concrete mixture. The two-step addition process follows a specific order for the addition of the materials to a concrete mixer drum. Concrete made using the hemp straw ash is useful for lower-strength applications.
Claims17
A process for making concrete comprising:
- grinding hemp straw to result in ground hemp straw;
- burning the ground hemp straw to result in hemp straw ash;
- mixing superplasticizer, fine aggregate, coarse aggregate, cement, water and the hemp straw ash to result in a concrete mixture, wherein the concrete mixture comprises, by weight:
- 10-11% water;
- 37-41% coarse aggregate;
- 29-36% fine aggregate;
- superplasticizer up to 0.08%;
- hemp straw ash up to 5%;
- and
- 14 to 19% cement.
A concrete mixture comprising, by weight:
- 10-11% water;
- 37-41% coarse aggregate;
- 29-36% fine aggregate;
- superplasticizer up to 0.08%;
- hemp straw ash up to 5%;
- and
- 14 to 19% cement.
Concrete solidified from a concrete mixture, the concrete mixture comprising, by weight:
- 10-11% water;
- 37-41% coarse aggregate;
- 29-36% fine aggregate;
- superplasticizer up to 0.08%;
- hemp straw ash up to 5%;
- and
- 14 to 19% cement.
Dependencies are inferred from the claim text.