Author: P. S. Bussone
Publisher:
ISBN:
Category : Cement
Languages : en
Pages : 35
Book Description
Three cements have been studied for possible use in the rapid repair of bomb-managed runways. These are: (a) lumnite (L), a high-alumina cement which was blended with portland cements type I, II, and III, regulated-set cement, and other concrete admixtures; (b) regulated-set cement (R), a halogenated calcium aluminate cement which was blended with gypsum additives in varying amounts from 0 to 12.5 percent and also mixed with an accelerator, sodium metasilicate (SMS); and (c) ordinary portland cement with various accelerators, Sigunit (S), sodium metasilicate (SMS), and sodium carbonate. Compressive strength of 2-in. cubes were determined at ages varying from 45 min to 28 days to establish strength development information. With some cements, neat slurry grout-type mixtures were made and tested in the same manner as the mortar mixtures. Water-cement ratios varied from 0.50 to 0.70 for the mortar mixtures and flow, when measured, was determined by the flow table method. With the neat slurry mixtures w/c ratios varied from 0.30 to 0.80, the efflux time being measured by the flow-cone method. The results indicate the following: (a) that many of the accelerators and so-called fast-setting cements do not develop 1-hour strengths sufficient for use in rapid repair of bomb-damaged runways; (b) two materials studied have yielded 1-hour compressive strengths in excess of 1000 psi. One is a cement, regulated-set, a proprietary product of the Portland Cement Association, and the second is an accelerator, known as sodium metasilicate, which has shown promise in both mixtures of ordinary portland and regulated-set cements.
Rapid Repair of Bomb-Damaged Runways. Phase I. Preliminary Laboratory Investigation
Author: P. S. Bussone
Publisher:
ISBN:
Category : Cement
Languages : en
Pages : 35
Book Description
Three cements have been studied for possible use in the rapid repair of bomb-managed runways. These are: (a) lumnite (L), a high-alumina cement which was blended with portland cements type I, II, and III, regulated-set cement, and other concrete admixtures; (b) regulated-set cement (R), a halogenated calcium aluminate cement which was blended with gypsum additives in varying amounts from 0 to 12.5 percent and also mixed with an accelerator, sodium metasilicate (SMS); and (c) ordinary portland cement with various accelerators, Sigunit (S), sodium metasilicate (SMS), and sodium carbonate. Compressive strength of 2-in. cubes were determined at ages varying from 45 min to 28 days to establish strength development information. With some cements, neat slurry grout-type mixtures were made and tested in the same manner as the mortar mixtures. Water-cement ratios varied from 0.50 to 0.70 for the mortar mixtures and flow, when measured, was determined by the flow table method. With the neat slurry mixtures w/c ratios varied from 0.30 to 0.80, the efflux time being measured by the flow-cone method. The results indicate the following: (a) that many of the accelerators and so-called fast-setting cements do not develop 1-hour strengths sufficient for use in rapid repair of bomb-damaged runways; (b) two materials studied have yielded 1-hour compressive strengths in excess of 1000 psi. One is a cement, regulated-set, a proprietary product of the Portland Cement Association, and the second is an accelerator, known as sodium metasilicate, which has shown promise in both mixtures of ordinary portland and regulated-set cements.
Publisher:
ISBN:
Category : Cement
Languages : en
Pages : 35
Book Description
Three cements have been studied for possible use in the rapid repair of bomb-managed runways. These are: (a) lumnite (L), a high-alumina cement which was blended with portland cements type I, II, and III, regulated-set cement, and other concrete admixtures; (b) regulated-set cement (R), a halogenated calcium aluminate cement which was blended with gypsum additives in varying amounts from 0 to 12.5 percent and also mixed with an accelerator, sodium metasilicate (SMS); and (c) ordinary portland cement with various accelerators, Sigunit (S), sodium metasilicate (SMS), and sodium carbonate. Compressive strength of 2-in. cubes were determined at ages varying from 45 min to 28 days to establish strength development information. With some cements, neat slurry grout-type mixtures were made and tested in the same manner as the mortar mixtures. Water-cement ratios varied from 0.50 to 0.70 for the mortar mixtures and flow, when measured, was determined by the flow table method. With the neat slurry mixtures w/c ratios varied from 0.30 to 0.80, the efflux time being measured by the flow-cone method. The results indicate the following: (a) that many of the accelerators and so-called fast-setting cements do not develop 1-hour strengths sufficient for use in rapid repair of bomb-damaged runways; (b) two materials studied have yielded 1-hour compressive strengths in excess of 1000 psi. One is a cement, regulated-set, a proprietary product of the Portland Cement Association, and the second is an accelerator, known as sodium metasilicate, which has shown promise in both mixtures of ordinary portland and regulated-set cements.
Rapid Repair of Bomb-damaged Runways
A Concept for Rapid Repair of Bomb-damaged Runways Using Regulated-set Cement
Author: George C. Hoff
Publisher:
ISBN:
Category : Bombs
Languages : en
Pages : 168
Book Description
Publisher:
ISBN:
Category : Bombs
Languages : en
Pages : 168
Book Description
Rapid Repair of Bomb-damaged Runways
Author: W. G. Setser
Publisher:
ISBN:
Category : Military bases
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category : Military bases
Languages : en
Pages :
Book Description
Structural Repair of Bomb Damage to Airfield Runways
Author: Jimmy H. Smith
Publisher:
ISBN:
Category :
Languages : en
Pages : 202
Book Description
The purpose of this research is to develop techniques for rapidly repair-ing bomb damaged runways. Structural concepts for filling and/or spanning the crater are studied. Spanning systems, such as clear span and intermediate support systems, structural fill systems including inter- locking fills, and waterbag systems are considered as possible solutions. Only one concept, a honeycomb structural fill technique, fulfills the requirements of simplicity, speed, and dependability to merit further testing. This technique consists of filling a large portion of the crater with several modules constructed of interconnected, vertically placed polyvinyl chloride (PVC) pipes. Laboratory tests are conducted on bonding agents, capacity of individual pipe, several different size modules, and various module arrangements. The F-111 aircraft wheel loads are considered as the design loading. Results of these tests lead to a PVC module design for full-sclae field tests. A small preliminary field test indicates that the repair technique is feasible. (Author-PL).
Publisher:
ISBN:
Category :
Languages : en
Pages : 202
Book Description
The purpose of this research is to develop techniques for rapidly repair-ing bomb damaged runways. Structural concepts for filling and/or spanning the crater are studied. Spanning systems, such as clear span and intermediate support systems, structural fill systems including inter- locking fills, and waterbag systems are considered as possible solutions. Only one concept, a honeycomb structural fill technique, fulfills the requirements of simplicity, speed, and dependability to merit further testing. This technique consists of filling a large portion of the crater with several modules constructed of interconnected, vertically placed polyvinyl chloride (PVC) pipes. Laboratory tests are conducted on bonding agents, capacity of individual pipe, several different size modules, and various module arrangements. The F-111 aircraft wheel loads are considered as the design loading. Results of these tests lead to a PVC module design for full-sclae field tests. A small preliminary field test indicates that the repair technique is feasible. (Author-PL).
Development and Testing of Rapid Repair Methods for War Damaged Runways
Rapid Repair of Bomb Damaged Runways by Unique Chemical Means
Author: John A. Peasley
Publisher:
ISBN:
Category :
Languages : en
Pages : 296
Book Description
A study was made of chemical quick setting materials to evaluate the performance of the promising compositions for repair of a bomb damaged runway. A single wheel rolling test trailer was fabricated to test surfacing material and sub-base construction. A three (3) inch layer of wire reinforced polyester bonded rock was tested sucessfully on a 10 x 10 foot site at Eglin Air Force Base with a 28,000 pound load supported by an aircraft wheel 31 x 11:50, 272 psi tire. Special equipment to make full scale applications in the minimum time will be required. Polyester resins appear to show the most promise because of the greater latitude in curing condition. (Author).
Publisher:
ISBN:
Category :
Languages : en
Pages : 296
Book Description
A study was made of chemical quick setting materials to evaluate the performance of the promising compositions for repair of a bomb damaged runway. A single wheel rolling test trailer was fabricated to test surfacing material and sub-base construction. A three (3) inch layer of wire reinforced polyester bonded rock was tested sucessfully on a 10 x 10 foot site at Eglin Air Force Base with a 28,000 pound load supported by an aircraft wheel 31 x 11:50, 272 psi tire. Special equipment to make full scale applications in the minimum time will be required. Polyester resins appear to show the most promise because of the greater latitude in curing condition. (Author).
Development Test of Rapid Repair Techniques for Bomb-damaged Runways
New Concept Study for Repair of Bomb Damaged Runways
Author: E. Jack Baker
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 346
Book Description
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 346
Book Description
List of Publications of the U.S. Army Engineer Waterways Experiment Station
Author: U.S. Army Engineer Waterways Experiment Station
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 430
Book Description
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 430
Book Description