QUESTIONS

Q1. Q2. Table 18-6.—Bituminous Requirements Open-graded aggregate Rapid- and medium-curing liquid asphalts RC-250, RC-800, and MC-3000 Medium-setting asphalt emulsion MS-2 and CMS-2 Well-graded aggregate with little or no material passing the No. 200 sieve Rapid- and medium-curing liquid asphalts RC-250, RC-800, MC-250, and MC-800 Slow-curing liquid asphalts SC-250 and SC-800 Medium-setting and slow-setting asphalt emulsions MS-2, CMS-2, SS-1, and CSS-1 Aggregate with a considerable percentage of fine aggregate and material passing the No. 200 sieve Medium-curing liquid asphalts MC-250 and MC-800 Slow-curing liquid asphalts SC-250 and SC-800 Slow-setting asphalt emulsions SS-1, SS-1h, CSS-1, and CSS-1h Medium-setting asphalt emulsions MS-2 and CMS-2 The simplest type of bituminous stabilization is the application of liquid asphalt to the surface of an unbound aggregate road. For this type of operation, the slow- and medium-curing liquid asphalts SC-70, SC-250, MC-70, and MC-250 are used. QUESTIONS Q3. What type or types of additive(s) is/are best to use for stabilizing a soil that has a PI of 30 and contains 40-percent gravel 45-percent sand, and 15-percent fines? Q4. For a soil-cement mixture, what type of soil is likely to require the highest cement content? Assume that you are tasked with determining the cement content needed for a soil-cement mixture that will be used for a project located at a Marine Corps camp in South Korea. At a minimum, what laboratory tests will you need to perform? You are preparing to do an unconfined compression test on a soil-cement mixture using a soil that is 40-percent gravel. What compaction mold should you use? 18-9