39369998
Description
Flashcards by Joseph Steele, updated about 1 month ago
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Created by Joseph Steele
about 1 month ago
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| Question | Answer |
| avoiding loss of beding sand | -weeping holes placed at regular intervals through pored in place or precast concrete curbs -place cloth over joints or weep holes to prevent sand from entering |
| cleaning and sealing joint stabalization | loss of joint sand can occur high slope high wind areas with high surface run off -can be resolved with joint stablizers |
| step 1 | locate area to be remediated fixed -mark shoulder remove pavers 0.8ft behind excavation line |
| step 2 | remove first paver with paver extractor |
| step 1-5 | remove remaining pavers remove bedding sand excavate base material and soil, repair damaged base or utility as needed |
| step 6 | compact soil base compact base material compact base 2-4 inches 50-100mm lifts to required density |
| step7 | replace bedding sand layer screed with notched screed board achieving a crown, crown compensates for minor settling |
| step 8 | reinstate pavers adjust joint spacing and alignment |
| step 9 | compact reinstated pavers first compaction occurs After pavers are placed with no joint sand at least 2 passes |
| step 10 | place and spread joint sand |
| step 11 | vibrate till joints are filled with sand second pass works sand into joints sweep left over sand away |
| first interstate highway segmental pavers | romans empire 2000 years ago |
| seg clay brick pavement | 1000 ad |
| clay pavers used in streets of north America | 1800s |
| concrete pavers developed in the Netherlands | 1950s |
| first paver manufacturing machine in north America | 1973 |
| icpi components | 1.compact soil subgrade 2.geotextile as required by design 3.compacted aggregate 4.beding sand 1 inch 25 mm 5.concrete pavers with sand filled joints |
| factors effecting interlock | 1 paver thickness 2 laying pattern 3 consistent joint widths 4 stationary edge restraints 5 paver shape and size 6 crown in cross section |
| 3 types of interlock | horizontal vertical rotational |
| load distribution | slight movement in soil and from seasonal changes in moisture does not change the way the load is distributed |
| the 4 point system OSHA program components | 1.managment commitment and employee involvement 2.hazrd analysis 3.hazrd prevention and control 4.traning for employees supervisors and managers |
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