<p>In the present study, mixtures of cement pastes were made with the addition of corn starch. First, the starch was extracted, in the form of fine powder, from the native corn of Boyacá. Then, some properties of the obtained starch, such as texture, color and gelatinization, were determined. Next, cement pastes with and without starch addition were characterized. For this purpose, normal consistency and setting time tests were carried out. Starch addition percentages of 1%, 3%, 5% and 10% were used in the mixture.</p>