You would do something like this:
boolean isBlank = true;
public void render(SpriteBatch batch){
if(isBlank)
batch.draw(BlankTile,xCoord,yCoord);
else
batch.draw(RedTile,xCoord,yCoord);
}
Notice that you need a boolean variable to decide what kind of tile you want to draw. Also loading a new texture for every tile should have a really bad effect for performance. You should read about using TextureAtlas, AssetManager. Or just pass your Texture as a parameter to your Tile instead of creating new one every time.