1. A cementitious composite material for in-situ hydration, the composite comprising: a nonwoven first layer, the nonwoven first layer having a first side and an opposing second side, wherein the nonwoven first layer forms a plurality of discrete nodes spaced relative to one another along a first direction and a second direction; a cementitious material disposed within the nonwoven first layer, wherein the cementitious material includes a plurality of cementitious particles; a second layer disposed along the first side of the nonwoven first layer; and a third layer disposed along the opposing second side of the nonwoven first layer and configured to prevent at least a portion of the plurality of cementitious particles from migrating out of the nonwoven first layer, wherein the nonwoven first layer and the second layer comprise flexible materials and the second layer is coupled to the nonwoven first layer at the plurality of discrete nodes.