Kajian karakteristik fisik dan mekanik batu bata tanpa pembakaran campuran tanah, kapur, dan diperkuat potongan serat agave sisalana panjang 4 Cm dengan variasi 0%, 2%, 4%, 6% dari massa kapur = Physical and mechanical characteristics study of unifired bricks made from a mixture of clay, lime, and reinforced with 4 Cm length agave sisalana fibers with the variation 0%, 2%, 4%, and 6% of lime mass