Note 50 — PART I SPECIFICATIONS FOR STREET ROADWAY PAVEMENTS (continued 2)
Reading edition
The bituminous-cement joints are principally for the purpose of providing for the expansion of the pavement in very hot weather.
Experience seems to have proved that cement grout is, everything considered, the best and cheapest filling for the joints in brick pavement. If the filling is properly done, the edges of the brick are supported and the corners do not chip off. With the expansion joints provided at intervals by the bituminous-filled joints, the curbs will not be forced out of line, nor will the pavement be raised from its sand bed by expansion, causing the rumbling sound sometimes noticed.
Where grout filling is used there seems to be no necessity for covering the surface of the pavement with sand, as is usually done, provided the grout is kept damp.