* * CONCRETE MASONRY TECHNOLOGY * * Agriculture Mechanization/Engineering and Technical Support Services Concrete Masonry Technology (10 days) This unit deals with concrete technology. Topics include career opportunities; the history and uses of concrete; estimating, placing, and finishing concrete; and concrete masonry construction. Objectives To acquaint students with employment information and career opportunities in the concrete industry To develop student understanding of the history, manufacture, and types of Portland cement To develop student awareness of the fundamental relationships among cement, water, and aggregates To provide students with a background on the properties desired in plastic and hardened concrete To develop student understanding of the types and uses of concrete To develop student awareness of the standard tests used to determine the quality of concrete To acquaint students with the methods of specifying ready-mixed concrete for specific uses To increase student awareness of the proper use and care of tools used to place and finish concrete To prepare students to determine the amount of concrete needed for a job To demonstrate to students the proper placing procedures under various weather conditions, including use of reinforcement, finishing techniques, and control joints To demonstrate to students appropriate concrete masonry construction techniques Competencies At the conclusion of this unit, students will be able to explain current employment information such as job description, job availability, personal and educational requirements, working conditions, opportunity for advancement, and other factors relative to potential employment in the concrete technology industry and relate it to their personal needs and aspirations; describe the background and history of the concrete industry, including the development of concrete and cement usage; identify the various uses and types of concrete; describe the processes involved in the manufacture of Portland cement; explain the fundamental relationships among cement, water, and aggregates; design and construct specific projects using concrete, according to appropriate practices; demonstrate proper use and care for tools used in placing and finishing concrete; and describe the proper characteristics of high-quality concrete. Subject Matter (Basic skills integration areas are shown in brackets following title.) Careers - Current and future employment needs - Job descriptions - Training requirements - Working conditions - Opportunities for advancement - Other factors Historical background of the Portland cement and concrete industries Basic information about concrete [Science] - Cement, water, and aggregates - Mixing procedure - Additives Air entrainment agents Calcium chloride Others - Standard quality tests Uses of concrete - General agricultural uses - Special uses Concrete estimating [Mathematics] - Ready-mixed concrete - Job-mixed concrete Placing and finishing concrete - Tools needed - Forming - Reinforcement - Finishing and curing procedures - Special finishes - Repairing the concrete finish - Cold- and hot-weather curing Concrete masonry construction - Mortar mixes - Block placement - Special reinforcement - Joint finishing Motivational Activities Take field trips to a ready-mix plant and a construction site. View videotapes, films, and slides on the concrete industry. Post bulletin board displays featuring topics related to this unit. Use computer software to determine the amount of concrete needed for a variety of jobs. Learning Activities Participate in a Supervised Agricultural Experience program. Calculate the amount of cement and aggregates needed for a concrete driveway. Set up laboratory exercises to mix, quality test, place, finish, and cure concrete. Instructional Materials Textbooks and References Advanced Masonry Skills by Richard T. Kren, Sr. 2nd ed. Albany, NY: Delmar, 1983. Available from National Farm Book Company. Concrete and Concrete Masonry by Donald Ahrens et al. St. Paul, MN: Hobar, 1976. Concrete Technology by George R. White. 3rd ed. Albany, NY: Delmar, 1977. Available from Hobar Publications. Construction: Principles, Materials and Methods by John L. Schmidt, Walter H. Lewis, and Harold B. Olin. 5th ed. Danville, IL: Interstate, 1983. Available from National Farm Book Company. Masonry Simplified: Tools, Materials and Practice by James R. Dalzell and Gilbert Townsend. 3rd ed. Chicago: American Technical Society, 1973. Masonry Skills by Richard T. Kren, Sr. 2nd ed. Albany, NY: Delmar, 1982. Available from National Farm Book Company. Mechanics in Agriculture by Lloyd J. Phipps. 3rd ed. Danville, IL: Interstate, 1978. Modern Agricultural Mechanics by T.J. Wakeman. Danville, IL: Interstate, 1977. Available from National Farm Book Company. Modern Masonry by Clois E. Kicklighter. South Holland, IL: Goodheart-Willcox, 1985. Available from National Farm Book Company. Safety for Masons by Richard T. Kren, Sr. Albany, NY: Delmar, 1979. Available from Hobar Publications. Bulletins and Pamphlets The following are available from Hobar Publications. Concrete Construction Worksheets. #541. (Set of ten, each in a pad of 25). Also available in individual pads of 25, titles and order numbers are as follows: "Bicycle Stand." #538. "Car Parking Bumper." #539. "Driveway Marker." #537. "Hog Trough." #533. "Mixing Concrete." #531. " 1 x 1 Patio Block." #535. " 1 x 2 Patio Block." #536. "Shoe Scraper with Concrete Base." #540. "Slump Test." #532. "Splash Block." #534. Quality Concrete Manual. #164. rev. 1971. Recommended Practices for Laying Concrete Block. #PA043M. rev. 1980. The following are available from the Ohio Agricultural Education Curriculum Materials Service. Concrete Improvements for Farm and Home. 707X. Illinois Vocational Agriculture Service, n.d. Recommended Practices for Building with Concrete Masonry. 706X. Illinois Vocational Agriculture Service, 1980. The following is available from Randolph Concrete Products, Inc. Randolph Slatted Floor Systems Periodicals Concrete Construction Computer Software The following are available from Hobar Publications. Bill of Material Record. Apple. Concrete and Related Review. Apple, IBM, TRS, Macintosh. Mixing and Estimating Concrete. Apple. Films, Videotapes, and Slides The following are available from Hobar Publications. Block. MAS040 (Three sound filmstrips with teacher's guide and student work sheets. Filmstrip titles: "The Block Corner," " The Block Pier," and "Laying Block to the Line"). Brick - Part A. MAS020 (Three sound filmstrips with teacher's guide and student work sheets. Filmstrip titles: "Laying Brick," "The Rock-Back Lead," and "The Straight Lead"). Brick - Part B. MAS030 (Three sound filmstrips with teacher's guide and student work sheets. Filmstrip titles: "The Corner," "The Pier," and "Laying to the Line"). Hand Tools and Mortar. MAS010 (Three sound filmstrips with teacher's guide and student work sheets. Filmstrip titles: "Basic Hand Tools," "Mixing Mortar by Hand," and "Spreading Mortar"). The following are available from the Ohio Agricultural Education Curriculum Materials Service. Concrete Masonry. 7001S (55 color slides and script). 1962. Mr. Quality Concrete. 7003S (40 color slides). 1965.