Producing of Lightweight Concrete from Two Varieties of Natural Pozzolan from the Middle Atlas (Morocco): Economic, Ecological, and Social Implications

Silicon ◽

10.1007/s12633-021-01155-8 ◽

2021 ◽

Author(s):

Abdelilah Bellil ◽

Ayoub Aziz ◽

Iz-Iddine El Amrani El Hassani ◽

Mohammed Achab ◽

Abdelilah El Haddar ◽

...

Keyword(s):

Lightweight Concrete ◽

Social Implications ◽

Natural Pozzolan ◽

Middle Atlas

Download Full-text

Effects of the Variety and Content of Natural Pozzolan Coarse Aggregate on the Thermo-Mechanical Properties of Concrete

Biointerface Research in Applied Chemistry ◽

10.33263/briac124.54055415 ◽

2021 ◽

Vol 12 (4) ◽

pp. 5405-5415

Keyword(s):

Mechanical Properties ◽

Thermal Conductivity ◽

Compressive Strength ◽

Coarse Aggregate ◽

The Other ◽

Natural Pozzolan ◽

Coarse Aggregates ◽

Natural Aggregate ◽

Middle Atlas

The present study investigated the effects of the variety and content of three natural pozzolan coarse aggregates on concrete. Natural pozzolan aggregates have been obtained from three volcanoes (Boutagrouine, Timahdite, and Jbel Hebri) located in the Middle Atlas region in Morocco. The three pozzolans studied were characterized, and then a comparison was made by replacing the natural aggregate with the pozzolan aggregate in the concrete in different percentages, namely 25, 50, and 100 % in volume. The results showed that the variety and content of pozzolan aggregate have a significant impact on the properties of concrete, primarily caused by the characterization of pozzolan aggregate. The density of concrete decreases with the addition of pozzolan aggregate, which decreases depending on the type of pozzolan aggregate used. The highest compressive strength was measured in the concrete specimens prepared with aggregate BP while the lowest compressive strength was noted in the concrete specimens prepared with aggregate RP. On the other hand, the substitution of NA at 100% by BP, GP, and RP aggregates leads to a decrease in the thermal conductivity of about 67%, 62%, and 55% respectively.

Download Full-text

Effect of slaked lime on the geopolymers synthesis of natural pozzolan from Moroccan Middle Atlas

Journal of the Australian Ceramic Society ◽

10.1007/s41779-019-00361-3 ◽

2019 ◽

Vol 56 (1) ◽

pp. 67-78 ◽

Cited By ~ 2

Author(s):

Ayoub Aziz ◽

Iz-Eddine El Amrani El Hassani ◽

Abdellali El Khadiri ◽

Chaouki Sadik ◽

Abdeslam El Bouari ◽

...

Keyword(s):

Natural Pozzolan ◽

Slaked Lime ◽

Middle Atlas

Download Full-text

Teachers' Stereotypes of Children Who Wear Hearing Aids

Language Speech and Hearing Services in Schools ◽

10.1044/0161-1461.1203.139 ◽

1981 ◽

Vol 12 (3) ◽

pp. 139-144 ◽

Cited By ~ 3

Author(s):

Cletus G. Fisher ◽

Kenneth Brooks

Keyword(s):

Elementary School ◽

School Child ◽

Hearing Aids ◽

Hearing Aid ◽

Social Implications ◽

Elementary School Child ◽

Classroom Teachers ◽

Frequency Of Occurrence ◽

Service Training

Classroom teachers were asked to list the traits they felt were characteristic of the elementary school child who wears a hearing aid. These listings were evaluated according to the desirability of the traits and were studied regarding frequency of occurrence, desirability, and educational, emotional, and social implications. The results of the groupings are discussed in terms of pre-service and in-service training.

Download Full-text