自然舗装材　楽々賛土(製造元：秩父コンクリート工業株式会社)

Rakuraku Sand paving method

Preparation for pavement

  1. Before pavement with tiresome weeding

  2. Remove weeds in the pavement area.

    Completely remove weeds including roots.

  3. Spray a sufficient amount of water on the ground before applying the material.

    An insufficient amount of water sprayed may cause insufficient solidification.

Watering method

  1. Uniformly apply Rakuraku Sand.

    Uniform pavement is necessary.

  2. Evenly spray so as not to make puddles.

    Slowly and carefully spray the designated quantity of water. In summer, spray water again the following day.

  3. Leave and cure for 24 to 72 hours until it becomes solid.

    Allow more time to cure in winter. Sand on the surface will naturally disappear.

Physical value(Test values are representative values and not guaranteed values.)


Item Material age Test value
Bending strength (N/mm2) 3 days 1.6
7 days 2.1
18 days 5.6
Compression strength (N/mm2) 3 days 5.6
7 days 10.3
18 days 11.6
Item Test value
Maximum water absorption (%) 18
Permeability coefficient (cm/s) 1×10-3
Environmental standard he second-class heavy metals (cd,Pb,Cr6+,As,T-Hg,R-Hg,Se,F,B,CN) do not exceed  standard value, which are specified in the Soil Contamination Countermeasures Act.