{"id":{"repo_id":"brazil-uerj","oai_identifier":"oai:pantheon.ufrj.br:11422/2291"},"canonical_url":"https://search.dev.ndltd.org/etd/brazil-uerj/oai:pantheon.ufrj.br:11422/2291","repository":{"repo_id":"brazil-uerj","name":"Brazil UERJ","base_url":"https://pantheon.ufrj.br/oai/request"},"display":{"title":"Estabilização de um solo fino laterítico pelo ácido fosfórico","abstract":"A laboratory research work was performed in order do verify the possibilities of stabilizing a fine lateritic soil with phosphoric acid. A sample of \"terra roxa legítima\" from Campinas, São Paulo, was studied. This is a lateritic soil resulting from the weathering of a diabase, and presenting 20% of free Fe2 O3; it has 100% passing no. 20 sieve and 74.1% passing no. 200 sieve. The experimental work was carried out mainly through unconfined compression tests in order to observe the influence on strength of the following variables. I- Percentage of phosphoric acid (on a dry soil weight basis); II- Amount of solution used in compacting the soil; III- Curing time; IV- Compaction energy; V- Curing temperature. A few other secondary studies were also performed: a) tensile strength from diameter compression tests; b) unconfined compression tests of soil treated with Portland cement, to compare with a common stabilizing agent. According to the results obtained, the soil that was inadequate to be used in a pavement layer, became strong enough for that purpose when treated with phosphoric acid.","abstract_html":"A laboratory research work was performed in order do verify the possibilities of stabilizing a fine lateritic soil with phosphoric acid. A sample of "terra roxa legítima" from Campinas, São Paulo, was studied. This is a lateritic soil resulting from the weathering of a diabase, and presenting 20% of free Fe2 O3; it has 100% passing no. 20 sieve and 74.1% passing no. 200 sieve. The experimental work was carried out mainly through unconfined compression tests in order to observe the influence on strength of the following variables. I- Percentage of phosphoric acid (on a dry soil weight basis); II- Amount of solution used in compacting the soil; III- Curing time; IV- Compaction energy; V- Curing temperature. A few other secondary studies were also performed: a) tensile strength from diameter compression tests; b) unconfined compression tests of soil treated with Portland cement, to compare with a common stabilizing agent. According to the results obtained, the soil that was inadequate to be used in a pavement layer, became strong enough for that purpose when treated with phosphoric acid.","abstract_has_math":false,"creators":["Guida, Hugo Nicodemo"],"institution":"Universidade Federal do Rio de Janeiro","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Medina, Jacques de"],"committee_chairs":[],"committee_members":[],"year":1971,"date_issued":"1971-07","date_published":"1971-07","updated_at":"2026-07-24T01:15:49Z","subjects":["Estabilização dos solos","Ácido fosfórico"],"languages":["por"],"rights":["Acesso Aberto"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11422/2291","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Medina, Jacques de"]},{"key":"dc:creator","label":"Author","values":["Guida, Hugo Nicodemo"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2017-06-23T13:12:43Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2026-05-16T03:03:22Z"]},{"key":"dc:date.issued","label":"Date","values":["1971-07"]},{"key":"dc:publisher","label":"Institution","values":["Universidade Federal do Rio de Janeiro"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia"]},{"key":"dc:type","label":"Dc Type","values":["Dissertação"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Estabilização dos solos","Ácido fosfórico"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["por"]},{"key":"dc:rights","label":"Dc Rights","values":["Acesso Aberto"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/11422/2291"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["A laboratory research work was performed in order do verify the possibilities of stabilizing a fine lateritic soil with phosphoric acid. A sample of \"terra roxa legítima\" from Campinas, São Paulo, was studied. This is a lateritic soil resulting from the weathering of a diabase, and presenting 20% of free Fe2 O3; it has 100% passing no. 20 sieve and 74.1% passing no. 200 sieve. The experimental work was carried out mainly through unconfined compression tests in order to observe the influence on strength of the following variables. I- Percentage of phosphoric acid (on a dry soil weight basis); II- Amount of solution used in compacting the soil; III- Curing time; IV- Compaction energy; V- Curing temperature. A few other secondary studies were also performed: a) tensile strength from diameter compression tests; b) unconfined compression tests of soil treated with Portland cement, to compare with a common stabilizing agent. According to the results obtained, the soil that was inadequate to be used in a pavement layer, became strong enough for that purpose when treated with phosphoric acid."]},{"key":"dc:title","label":"Title","values":["Estabilização de um solo fino laterítico pelo ácido fosfórico"]}]}],"canonical_facts":{"dc:contributor.advisor":["Medina, Jacques de"],"dc:creator":["Guida, Hugo Nicodemo"],"dc:date.accessioned":["2017-06-23T13:12:43Z"],"dc:date.available":["2026-05-16T03:03:22Z"],"dc:date.issued":["1971-07"],"dc:description.abstract":["A laboratory research work was performed in order do verify the possibilities of stabilizing a fine lateritic soil with phosphoric acid. A sample of \"terra roxa legítima\" from Campinas, São Paulo, was studied. This is a lateritic soil resulting from the weathering of a diabase, and presenting 20% of free Fe2 O3; it has 100% passing no. 20 sieve and 74.1% passing no. 200 sieve. The experimental work was carried out mainly through unconfined compression tests in order to observe the influence on strength of the following variables. I- Percentage of phosphoric acid (on a dry soil weight basis); II- Amount of solution used in compacting the soil; III- Curing time; IV- Compaction energy; V- Curing temperature. A few other secondary studies were also performed: a) tensile strength from diameter compression tests; b) unconfined compression tests of soil treated with Portland cement, to compare with a common stabilizing agent. According to the results obtained, the soil that was inadequate to be used in a pavement layer, became strong enough for that purpose when treated with phosphoric acid."],"dc:identifier.uri":["http://hdl.handle.net/11422/2291"],"dc:language":["por"],"dc:publisher":["Universidade Federal do Rio de Janeiro"],"dc:publisher.department":["Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia"],"dc:rights":["Acesso Aberto"],"dc:subject":["Estabilização dos solos","Ácido fosfórico"],"dc:title":["Estabilização de um solo fino laterítico pelo ácido fosfórico"],"dc:type":["Dissertação"]},"updated_at":"2026-07-24T01:15:49Z"}